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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 1120 | $output = str_replace('>', '>', $output); |
| 1121 | |
| 1122 | return apply_filters('richedit_pre', $output); |
| 1123 | } |
| 1124 | |
| 1125 | function wp_htmledit_pre($output) { |
| 1126 | if ( !empty($output) ) |
| 1127 | $output = htmlspecialchars($output, ENT_NOQUOTES); // convert only < > & |
| 1128 | |
| 1129 | return apply_filters('htmledit_pre', $output); |
| 1130 | } |
| 1131 | |
| 1132 | function clean_url( $url, $protocols = null, $context = 'display' ) { |
| 1133 | $original_url = $url; |
| 1134 | |
| 1135 | if ('' == $url) return $url; |
| 1136 | $url = preg_replace('|[^a-z0-9-~+_.?#=!&;,/:%@()]|i', '', $url); |
| 1137 | $strip = array('%0d', '%0a'); |
| 1138 | $url = str_replace($strip, '', $url); |