| 1 | <?php
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| 2 | /**
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| 3 | ** A base module for [captchac] and [captchar]
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| 4 | **/
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| 5 |
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| 6 | /* Shortcode handler */
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| 7 |
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| 8 | function wpcf7_captcha_shortcode_handler( $tag ) {
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| 9 | global $wpcf7_contact_form;
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| 10 |
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| 11 | if ( ! is_array( $tag ) )
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| 12 | return '';
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| 13 |
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| 14 | $type = $tag['type'];
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| 15 | $name = $tag['name'];
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| 16 | $options = (array) $tag['options'];
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| 17 | $values = (array) $tag['values'];
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| 18 |
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| 19 | if ( empty( $name ) )
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| 20 | return '';
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| 21 |
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| 22 | $validation_error = '';
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| 23 | if ( is_a( $wpcf7_contact_form, 'WPCF7_ContactForm' ) )
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| 24 | $validation_error = $wpcf7_contact_form->validation_error( $name );
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| 25 |
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| 26 | $atts = '';
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| 27 | $id_att = '';
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| 28 | $class_att = '';
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| 29 | $size_att = '';
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| 30 | $maxlength_att = '';
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| 31 |
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| 32 | if ( 'captchac' == $type )
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| 33 | $class_att .= ' wpcf7-captcha-' . $name;
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| 34 |
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| 35 | foreach ( $options as $option ) {
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| 36 | if ( preg_match( '%^id:([-0-9a-zA-Z_]+)$%', $option, $matches ) ) {
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| 37 | $id_att = $matches[1];
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| 38 |
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| 39 | } elseif ( preg_match( '%^class:([-0-9a-zA-Z_]+)$%', $option, $matches ) ) {
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| 40 | $class_att .= ' ' . $matches[1];
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| 41 |
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| 42 | } elseif ( preg_match( '%^([0-9]*)[/x]([0-9]*)$%', $option, $matches ) ) {
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| 43 | $size_att = (int) $matches[1];
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| 44 | $maxlength_att = (int) $matches[2];
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| 45 | }
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| 46 | }
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| 47 |
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| 48 | if ( $id_att )
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| 49 | $atts .= ' id="' . trim( $id_att ) . '"';
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| 50 |
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| 51 | if ( $class_att )
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| 52 | $atts .= ' class="' . trim( $class_att ) . '"';
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| 53 |
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| 54 | // Value.
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| 55 | if ( is_a( $wpcf7_contact_form, 'WPCF7_ContactForm' ) && $wpcf7_contact_form->is_posted() )
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| 56 | $value = '';
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| 57 | else
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| 58 | $value = $values[0];
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| 59 |
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| 60 | if ( 'captchac' == $type ) {
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| 61 | if ( ! class_exists( 'ReallySimpleCaptcha' ) ) {
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| 62 | return '<em>' . __( 'To use CAPTCHA, you need <a href="http://wordpress.org/extend/plugins/really-simple-captcha/">Really Simple CAPTCHA</a> plugin installed.', 'wpcf7' ) . '</em>';
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| 63 | }
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| 64 |
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| 65 | $op = array();
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| 66 | // Default
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| 67 | $op['img_size'] = array( 72, 24 );
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| 68 | $op['base'] = array( 6, 18 );
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| 69 | $op['font_size'] = 14;
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| 70 | $op['font_char_width'] = 15;
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| 71 |
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| 72 | $op = array_merge( $op, wpcf7_captchac_options( $options ) );
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| 73 |
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| 74 | if ( ! $filename = wpcf7_generate_captcha( $op ) )
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| 75 | return '';
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| 76 |
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| 77 | if ( is_array( $op['img_size'] ) )
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| 78 | $atts .= ' width="' . $op['img_size'][0] . '" height="' . $op['img_size'][1] . '"';
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| 79 |
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| 80 | $captcha_url = trailingslashit( wpcf7_captcha_tmp_url() ) . $filename;
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| 81 | $html = '<img alt="captcha" src="' . $captcha_url . '"' . $atts . ' />';
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| 82 | $ref = substr( $filename, 0, strrpos( $filename, '.' ) );
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| 83 | $html = '<input type="hidden" name="_wpcf7_captcha_challenge_' . $name . '" value="' . $ref . '" />' . $html;
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| 84 |
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| 85 | return $html;
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| 86 |
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| 87 | } elseif ( 'captchar' == $type ) {
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| 88 | if ( $size_att )
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| 89 | $atts .= ' size="' . $size_att . '"';
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| 90 | else
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| 91 | $atts .= ' size="40"'; // default size
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| 92 |
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| 93 | if ( $maxlength_att )
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| 94 | $atts .= ' maxlength="' . $maxlength_att . '"';
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| 95 |
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| 96 | $html = '<input type="text" name="' . $name . '" value="' . esc_attr( $value ) . '"' . $atts . ' />';
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| 97 | $html = '<span class="wpcf7-form-control-wrap ' . $name . '">' . $html . $validation_error . '</span>';
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| 98 |
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| 99 | return $html;
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| 100 | }
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| 101 | }
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| 102 |
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| 103 | wpcf7_add_shortcode( 'captchac', 'wpcf7_captcha_shortcode_handler', true );
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| 104 | wpcf7_add_shortcode( 'captchar', 'wpcf7_captcha_shortcode_handler', true );
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| 105 |
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| 106 |
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| 107 | /* Validation filter */
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| 108 |
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| 109 | function wpcf7_captcha_validation_filter( $result, $tag ) {
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| 110 | global $wpcf7_contact_form;
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| 111 |
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| 112 | $type = $tag['type'];
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| 113 | $name = $tag['name'];
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| 114 |
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| 115 | $_POST[$name] = (string) $_POST[$name];
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| 116 |
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| 117 | $captchac = '_wpcf7_captcha_challenge_' . $name;
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| 118 |
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| 119 | if ( ! wpcf7_check_captcha( $_POST[$captchac], $_POST[$name] ) ) {
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| 120 | $result['valid'] = false;
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| 121 | $result['reason'][$name] = $wpcf7_contact_form->message( 'captcha_not_match' );
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| 122 | }
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| 123 |
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| 124 | wpcf7_remove_captcha( $_POST[$captchac] );
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| 125 |
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| 126 | return $result;
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| 127 | }
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| 128 |
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| 129 | add_filter( 'wpcf7_validate_captchar', 'wpcf7_captcha_validation_filter', 10, 2 );
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| 130 |
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| 131 |
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| 132 | /* Ajax echo filter */
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| 133 |
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| 134 | function wpcf7_captcha_ajax_echo_filter( $items ) {
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| 135 | global $wpcf7_contact_form;
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| 136 |
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| 137 | if ( ! is_a( $wpcf7_contact_form, 'WPCF7_ContactForm' ) )
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| 138 | return $items;
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| 139 |
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| 140 | if ( ! is_array( $items ) )
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| 141 | return $items;
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| 142 |
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| 143 | $fes = $wpcf7_contact_form->form_scan_shortcode(
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| 144 | array( 'type' => 'captchac' ) );
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| 145 |
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| 146 | if ( empty( $fes ) )
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| 147 | return $items;
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| 148 |
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| 149 | $refill = array();
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| 150 |
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| 151 | foreach ( $fes as $fe ) {
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| 152 | $name = $fe['name'];
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| 153 | $options = $fe['options'];
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| 154 |
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| 155 | if ( empty( $name ) )
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| 156 | continue;
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| 157 |
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| 158 | $op = wpcf7_captchac_options( $options );
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| 159 | if ( $filename = wpcf7_generate_captcha( $op ) ) {
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| 160 | $captcha_url = trailingslashit( wpcf7_captcha_tmp_url() ) . $filename;
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| 161 | $refill[$name] = $captcha_url;
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| 162 | }
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| 163 | }
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| 164 |
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| 165 | if ( ! empty( $refill ) )
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| 166 | $items['captcha'] = $refill;
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| 167 |
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| 168 | return $items;
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| 169 | }
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| 170 |
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| 171 | add_filter( 'wpcf7_ajax_json_echo', 'wpcf7_captcha_ajax_echo_filter' );
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| 172 |
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| 173 |
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| 174 | /* CAPTCHA functions */
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| 175 |
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| 176 | function wpcf7_init_captcha() {
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| 177 | global $wpcf7_captcha;
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| 178 |
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| 179 | if ( ! class_exists( 'ReallySimpleCaptcha' ) )
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| 180 | return false;
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| 181 |
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| 182 | if ( ! is_object( $wpcf7_captcha ) )
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| 183 | $wpcf7_captcha = new ReallySimpleCaptcha();
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| 184 | $captcha =& $wpcf7_captcha;
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| 185 |
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| 186 | $captcha->tmp_dir = trailingslashit( wpcf7_captcha_tmp_dir() );
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| 187 | wp_mkdir_p( $captcha->tmp_dir );
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| 188 | return true;
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| 189 | }
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| 190 |
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| 191 | function wpcf7_generate_captcha( $options = null ) {
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| 192 | global $wpcf7_captcha;
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| 193 |
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| 194 | if ( ! wpcf7_init_captcha() )
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| 195 | return false;
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| 196 | $captcha =& $wpcf7_captcha;
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| 197 |
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| 198 | if ( ! is_dir( $captcha->tmp_dir ) || ! is_writable( $captcha->tmp_dir ) )
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| 199 | return false;
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| 200 |
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| 201 | $img_type = imagetypes();
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| 202 | if ( $img_type & IMG_PNG )
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| 203 | $captcha->img_type = 'png';
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| 204 | elseif ( $img_type & IMG_GIF )
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| 205 | $captcha->img_type = 'gif';
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| 206 | elseif ( $img_type & IMG_JPG )
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| 207 | $captcha->img_type = 'jpeg';
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| 208 | else
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| 209 | return false;
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| 210 |
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| 211 | if ( is_array( $options ) ) {
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| 212 | if ( isset( $options['img_size'] ) )
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| 213 | $captcha->img_size = $options['img_size'];
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| 214 | if ( isset( $options['base'] ) )
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| 215 | $captcha->base = $options['base'];
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| 216 | if ( isset( $options['font_size'] ) )
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| 217 | $captcha->font_size = $options['font_size'];
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| 218 | if ( isset( $options['font_char_width'] ) )
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| 219 | $captcha->font_char_width = $options['font_char_width'];
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| 220 | if ( isset( $options['fg'] ) )
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| 221 | $captcha->fg = $options['fg'];
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| 222 | if ( isset( $options['bg'] ) )
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| 223 | $captcha->bg = $options['bg'];
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| 224 | }
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| 225 |
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| 226 | $prefix = mt_rand();
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| 227 | $captcha_word = $captcha->generate_random_word();
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| 228 | return $captcha->generate_image( $prefix, $captcha_word );
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| 229 | }
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| 230 |
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| 231 | function wpcf7_check_captcha( $prefix, $response ) {
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| 232 | global $wpcf7_captcha;
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| 233 |
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| 234 | if ( ! wpcf7_init_captcha() )
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| 235 | return false;
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| 236 | $captcha =& $wpcf7_captcha;
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| 237 |
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| 238 | return $captcha->check( $prefix, $response );
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| 239 | }
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| 240 |
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| 241 | function wpcf7_remove_captcha( $prefix ) {
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| 242 | global $wpcf7_captcha;
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| 243 |
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| 244 | if ( ! wpcf7_init_captcha() )
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| 245 | return false;
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| 246 | $captcha =& $wpcf7_captcha;
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| 247 |
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| 248 | $captcha->remove( $prefix );
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| 249 | }
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| 250 |
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| 251 | function wpcf7_cleanup_captcha_files() {
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| 252 | $dir = trailingslashit( wpcf7_captcha_tmp_dir() );
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| 253 |
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| 254 | if ( ! is_dir( $dir ) )
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| 255 | return false;
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| 256 | if ( ! is_readable( $dir ) )
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| 257 | return false;
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| 258 | if ( ! is_writable( $dir ) )
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| 259 | return false;
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| 260 |
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| 261 | if ( $handle = @opendir( $dir ) ) {
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| 262 | while ( false !== ( $file = readdir( $handle ) ) ) {
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| 263 | if ( ! preg_match( '/^[0-9]+\.(php|png|gif|jpeg)$/', $file ) )
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| 264 | continue;
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| 265 |
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| 266 | $stat = stat( $dir . $file );
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| 267 | if ( $stat['mtime'] + 21600 < time() ) // 21600 secs == 6 hours
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| 268 | @unlink( $dir . $file );
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| 269 | }
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| 270 | closedir( $handle );
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| 271 | }
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| 272 | }
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| 273 |
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| 274 | if ( ! is_admin() && 'GET' == $_SERVER['REQUEST_METHOD'] )
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| 275 | wpcf7_cleanup_captcha_files();
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| 276 |
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| 277 | function wpcf7_captchac_options( $options ) {
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| 278 | if ( ! is_array( $options ) )
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| 279 | return array();
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| 280 |
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| 281 | $op = array();
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| 282 | $image_size_array = preg_grep( '%^size:[smlSML]$%', $options );
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| 283 |
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| 284 | if ( $image_size = array_shift( $image_size_array ) ) {
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| 285 | preg_match( '%^size:([smlSML])$%', $image_size, $is_matches );
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| 286 | switch ( strtolower( $is_matches[1] ) ) {
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| 287 | case 's':
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| 288 | $op['img_size'] = array( 60, 20 );
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| 289 | $op['base'] = array( 6, 15 );
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| 290 | $op['font_size'] = 11;
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| 291 | $op['font_char_width'] = 13;
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| 292 | break;
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| 293 | case 'l':
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| 294 | $op['img_size'] = array( 84, 28 );
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| 295 | $op['base'] = array( 6, 20 );
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| 296 | $op['font_size'] = 17;
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| 297 | $op['font_char_width'] = 19;
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| 298 | break;
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| 299 | case 'm':
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| 300 | default:
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| 301 | $op['img_size'] = array( 72, 24 );
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| 302 | $op['base'] = array( 6, 18 );
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| 303 | $op['font_size'] = 14;
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| 304 | $op['font_char_width'] = 15;
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| 305 | }
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| 306 | }
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| 307 |
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| 308 | $fg_color_array = preg_grep( '%^fg:#([0-9a-fA-F]{3}|[0-9a-fA-F]{6})$%', $options );
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| 309 | if ( $fg_color = array_shift( $fg_color_array ) ) {
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| 310 | preg_match( '%^fg:#([0-9a-fA-F]{3}|[0-9a-fA-F]{6})$%', $fg_color, $fc_matches );
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| 311 | if ( 3 == strlen( $fc_matches[1] ) ) {
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| 312 | $r = substr( $fc_matches[1], 0, 1 );
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| 313 | $g = substr( $fc_matches[1], 1, 1 );
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| 314 | $b = substr( $fc_matches[1], 2, 1 );
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| 315 | $op['fg'] = array( hexdec( $r . $r ), hexdec( $g . $g ), hexdec( $b . $b ) );
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| 316 | } elseif ( 6 == strlen( $fc_matches[1] ) ) {
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| 317 | $r = substr( $fc_matches[1], 0, 2 );
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| 318 | $g = substr( $fc_matches[1], 2, 2 );
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| 319 | $b = substr( $fc_matches[1], 4, 2 );
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| 320 | $op['fg'] = array( hexdec( $r ), hexdec( $g ), hexdec( $b ) );
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| 321 | }
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| 322 | }
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| 323 |
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| 324 | $bg_color_array = preg_grep( '%^bg:#([0-9a-fA-F]{3}|[0-9a-fA-F]{6})$%', $options );
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| 325 | if ( $bg_color = array_shift( $bg_color_array ) ) {
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| 326 | preg_match( '%^bg:#([0-9a-fA-F]{3}|[0-9a-fA-F]{6})$%', $bg_color, $bc_matches );
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| 327 | if ( 3 == strlen( $bc_matches[1] ) ) {
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| 328 | $r = substr( $bc_matches[1], 0, 1 );
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| 329 | $g = substr( $bc_matches[1], 1, 1 );
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| 330 | $b = substr( $bc_matches[1], 2, 1 );
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| 331 | $op['bg'] = array( hexdec( $r . $r ), hexdec( $g . $g ), hexdec( $b . $b ) );
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| 332 | } elseif ( 6 == strlen( $bc_matches[1] ) ) {
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| 333 | $r = substr( $bc_matches[1], 0, 2 );
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| 334 | $g = substr( $bc_matches[1], 2, 2 );
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| 335 | $b = substr( $bc_matches[1], 4, 2 );
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| 336 | $op['bg'] = array( hexdec( $r ), hexdec( $g ), hexdec( $b ) );
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| 337 | }
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| 338 | }
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| 339 |
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| 340 | return $op;
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| 341 | }
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| 342 |
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| 343 | $wpcf7_captcha = null;
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| 344 |
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| 345 | ?>
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