UK [ˈentəti] US [ˈɛntɪti]
n. Entity; actual existence; essence
php htmlentities() function syntax
Function:Convert characters to HTML entities
Syntax: htmlentities(string,flags,character-set,double_encode)
Parameters:
| Parameters | Description |
| string | Required, specifies the string to be converted |
| flags | Optional. Specifies how to handle quotes, invalid encodings, and which document type to use. Available quote types: ENT_COMPAT - Default. Only double quotes are encoded. ENT_QUOTES - Encodes double and single quotes. ENT_NOQUOTES - Do not encode any quotes. Invalid encoding: ENT_IGNORE - Ignore invalid encodings instead of having the function return an empty string. This should be avoided as this may have an impact on security. ENT_SUBSTITUTE - Substitutes an invalid encoding with the specified character with the Unicode substitution character U FFFD (UTF-8) or &#FFFD; instead of returning an empty string. ENT_DISALLOWED - Replaces invalid code points in the specified document type with the Unicode replacement character U FFFD (UTF-8) or &#FFFD;. Additional flags specifying the document type to use: ENT_HTML401 - Default. Code processed as HTML 4.01. ENT_HTML5 - Process code as HTML 5. ENT_XML1 - Code processed as XML 1. ENT_XHTML - Processing code as XHTML. |
| character-set | Optional. A string specifying the character set to be used. Allowed values: UTF-8 - Default. ASCII compatible multi-byte 8-bit Unicode, ISO-8859-1 - Western Europe, ISO-8859-15 - Western Europe (adds French and Finnish letters missing from ISO-8859-1 for Euro symbol), cp866 - DOS-specific Cyrillic characters set, cp1251 - Windows-specific Cyrillic character set, cp1252 - Windows-specific Western European character set, KOI8-R - Russian, BIG5 - Traditional Chinese, mainly used in Taiwan, GB2312 - Simplified Chinese, national standard character set, BIG5-HKSCS - with Hong Kong Extended Big5, Shift_JIS - Japanese, EUC-JP - Japanese, MacRoman - Character set used by Mac operating systems. In versions prior to PHP 5.4, unrecognized character sets will be ignored and replaced by ISO-8859-1. As of PHP 5.4, unrecognized character sets are ignored and replaced by UTF-8. |
| double_encode | Optional. Boolean value that specifies whether to encode existing HTML entities. TRUE - Default. Each entity will be converted. FALSE - Existing HTML entities will not be encoded. |
Description: Convert characters into HTML entities.
php htmlentities() function example
<?php $str = "Bill& 'Steve'"; echo htmlentities($str, ENT_COMPAT); // 只转换双引号 echo "<br>"; echo htmlentities($str, ENT_QUOTES); // 转换双引号和单引号 echo "<br>"; echo htmlentities($str, ENT_NOQUOTES); // 不转换任何引号 ?>
Run Instance»
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Output:
Bill & 'Steve' Bill & 'Steve' Bill & 'Steve'