Php htmlspecialchars
From w3cyberlearnings
Contents |
PHP function htmlspecialchars
This function converts predefined characters to HTML entities.
Syntax htmlspecialchars
- string: string input
- quotestyle: How to encode double and single quotes
- ENT_COMPAT - Default, encodes double quotes only
- ENT_QUOTE - Encodes single and double quotes
- ENT_NOTQUOTES - Not encodes double and single quotes.
- ENT_IGNORE - Silently discard invalid code unit sequences instead of returning an empty string. Using this flag is discouraged as it ยป may have security implications.
- ENT_SUBSTITUTE - Replace invalid code unit sequences with a Unicode Replacement Character U+FFFD (UTF-8) or &#FFFD; (otherwise) instead of returning an empty string.
- ENT_DISALLOWED - Replace invalid code points for the given document type with a Unicode Replacement Character U+FFFD (UTF-8) or &#FFFD; (otherwise) instead of leaving them as is. This may be useful, for instance, to ensure the well-formedness of XML documents with embedded external content.
- ENT_HTML401 - Handle code as HTML 4.01.
- ENT_XML1 - Handle code as XML 1.
- ENT_XHTML - Handle code as XHTML.
- ENT_HTML5 - Handle code as HTML 5.
- character-set:
- ISO-8859-1 - Default. Western European
- ISO-8859-15 - Western European (adds the Euro sign + French and Finnish letters missing in ISO-8859-1)
- UTF-8 - ASCII compatible multi-byte 8-bit Unicode
- cp866 - DOS-specific Cyrillic charset
- cp1251 - Windows-specific Cyrillic charset
- cp1252 - Windows specific charset for Western European
- KOI8-R - Russian
- BIG5 - Traditional Chinese, mainly used in Taiwan
- GB2312 - Simplified Chinese, national standard character set
- BIG5-HKSCS - Big5 with Hong Kong extensions
- Shift_JIS - Japanese
- EUC-JP - Japanese
htmlspecialchars(string,quotestyle,character-set);
Predefine characters
Example 1
<?php $numberfor ="a + b > 30"; echo htmlspecialchars($numberfor); ?>
Output
a + b > 30 // display as HTML view source a + b > 30
Example 2
<?php
$new = htmlspecialchars("<a href='w3cyberlearnings.com'>Learning</a>", ENT_QUOTES);
echo $new;
?>
Output
<a href='w3cyberlearnings.com'>Learning</a> // dispaly as HTML view source <a href='w3cyberlearnings.com'>Learning</a>
