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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.
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59 | $dynamic_characters = array('/\'(\d\d(?:’|\')?s)/', '/(\s|\A|[([{<]|")\'/', '/(\d+)"/', '/(\d+)\'/', '/(\S)\'([^\'\s])/', '/(\s|\A|[([{<])"(?!\s)/', '/"(\s|\S|\Z)/', '/\'([\s.]|\Z)/', '/(\d+)x(\d+)/'); |
60 | $dynamic_replacements = array('’$1','$1‘', '$1″', '$1′', '$1’$2', '$1' . $opening_quote . '$2', $closing_quote . '$1', '’$1', '$1×$2'); |
61 |
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62 | $static_setup = true; |
63 | } |
64 |
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65 | // Transform into regexp sub-expression used in _wptexturize_pushpop_element |
66 | // Must do this everytime in case plugins use these filters in a context sensitive manner |
67 | $no_texturize_tags = '(' . implode('|', apply_filters('no_texturize_tags', $default_no_texturize_tags) ) . ')'; |
68 | $no_texturize_shortcodes = '(' . implode('|', apply_filters('no_texturize_shortcodes', $default_no_texturize_shortcodes) ) . ')'; |
69 |
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70 | $no_texturize_tags_stack = array(); |
71 | $no_texturize_shortcodes_stack = array(); |
72 |
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73 | for ( $i = 0; $i < $stop; $i++ ) { |
74 | $curl = $textarr[$i]; |
75 |
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76 | if ( !empty($curl) && '<' != $curl{0} && '[' != $curl{0} |
77 | && empty($no_texturize_shortcodes_stack) && empty($no_texturize_tags_stack)) { |