PHP clears HTML formatted code_PHP tutorial

When character interception, accidents often occur due to the HTML format. ASP is the case, and php(as the current mainstream development language) is the same. If it is a foreseeable and simple HTML format, just use replace. For the article text, The class may contain all HTML formats. If you want to be more efficient, use the following. Tested

$search = array ("']*?>.*?< /script>'si", // Remove javascript
"'<[/!]*?[^<>]*?>'si", // Remove HTML tags
"'( [rn])[s]+'", "'&(quot|#34);'i", //Remove whitespace characters
"'&(amp|#38) ;'i",
"'&(lt|#60);'i",
"'&(gt|#62);'i",
"'&(nbsp|#160 );'i",
"'&(iexcl|#161);'i",
"'&(cent|#162);'i",
"'&(pound|# 163);'i",
"'&(copy|#169);'i",
"'(d+);'e"); Current mainstream development languages)
Code running$replace = array ("",
                                                                                          
"& ",
                "<",
                                                                                                       
chr(162),
chr(163),
chr(169),
"chr(1)");
//$document is a string that needs to be processed. If the source is a file, $document = file_get_contents($filename);
//$ text = preg_replace($search, $replace, $document);

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