Convert some characters into HTML entities:
<?php$str = "<© W3CSçh°°¦§>";echo htmlentities($str);?>The HTML output of the above code is as follows (view source code):
<!DOCTYPE html><html><body><© W3CSçh°°¦§></body></html>The browser output of the above code is as follows:
<© W3CSçh°°¦§>The htmlentities() function converts characters into HTML entities.
Tip: To convert HTML entities back to characters, use the html_entity_decode() function.
Tip: Use the get_html_translation_table() function to return the translation table used by htmlentities().
htmlentities( string,flags,character-set,double_encode )
| parameter | describe |
|---|---|
| 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 replacement 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 characters 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 - code processed as HTML 5. ENT_XML1 - Code processed as XML 1. ENT_XHTML - as XHTML processing code. |
| 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 (added euro symbol + French and Finnish letters missing from ISO-8859-1) cp866 - DOS-specific Cyrillic character 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 - Big5 with Hong Kong extension Shift_JIS - Japanese EUC-JP - Japanese MacRoman - Character set used by the Mac operating system Note: In versions prior to PHP 5.4, unrecognized character sets were 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. A 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. |
| Return value: | Returns the converted string. If string contains an invalid encoding, an empty string is returned unless the ENT_IGNORE or ENT_SUBSTITUTE flag is set. |
|---|---|
| PHP version: | 4+ |
| Update log: | In PHP 5, the default value of the character-set parameter changed to UTF-8. In PHP 5.4, new: ENT_SUBSTITUTE, ENT_DISALLOWED, ENT_HTML401, ENT_HTML5, ENT_XML1, and ENT_XHTML. In PHP 5.3, ENT_IGNORE was added. In PHP 5.2.3, the double_encode parameter was added. In PHP 4.1, the character-set parameter was added. |
Convert some characters into HTML entities:
<?php$str = "Jane & 'Tarzan'";echo htmlentities($str, ENT_COMPAT); // Will only convert double quotesecho "<br>";echo htmlentities($str, ENT_QUOTES); // Converts double and single quotesecho "<br>";echo htmlentities($str, ENT_NOQUOTES); // Does not convert any quotes?>The HTML output of the above code is as follows (view source code):
<!DOCTYPE html><html><body>Jane & 'Tarzan'<br>Jane & 'Tarzan'<br>Jane & 'Tarzan'</body></html>The browser output of the above code is as follows:
Jane & 'Tarzan'Jane & 'Tarzan'Jane & 'Tarzan'Convert some characters to HTML entities by using the Western European character set:
<?php$str = "My name is Øyvind Åsane. I'm Norwegian.";echo htmlentities($str, ENT_QUOTES, "ISO-8859-1"); // Will only convert double quotes (not single quotes), and uses the character-set Western European?>The HTML output of the above code is as follows (view source code):
<!DOCTYPE html><html><body>My name is Øyvind Åsane. I'm Norwegian.</body></html>The browser output of the above code is as follows:
My name is Øyvind Åsane. I'm Norwegian.