htmlentities Convert all applicable characters to HTML entities &reftitle.description; stringhtmlentities stringstring intflagsENT_COMPAT stringcharset booldouble_encodetrue This function is identical to htmlspecialchars in all ways, except with htmlentities, all characters which have HTML character entity equivalents are translated into these entities. If you're wanting to decode instead (the reverse) you can use html_entity_decode. &reftitle.parameters; string The input string. flags Like htmlspecialchars, the optional second flags parameter lets you define what will be done with 'single' and "double" quotes. It takes on one of three constants with the default being ENT_COMPAT, optionally combined with a fourth ENT_IGNORE (since PHP 5.3.0): Constant Name Description ENT_COMPAT Will convert double-quotes and leave single-quotes alone. ENT_QUOTES Will convert both double and single quotes. ENT_NOQUOTES Will leave both double and single quotes unconverted. ENT_IGNORE Silently discard invalid code unit sequences instead of returning an empty string. Added in PHP 5.3.0. This is provided for backwards compatibility; avoid using it as it may have security implications. charset Like htmlspecialchars, it takes an optional third argument charset which defines character set used in conversion. Presently, the ISO-8859-1 character set is used as the default. However, this default is very likely to change in future versions of PHP; the programmer is highly encouraged to specify a value. &reference.strings.charsets; double_encode When double_encode is turned off PHP will not encode existing html entities. The default is to convert everything. &reftitle.returnvalues; Returns the encoded string. &reftitle.changelog; &Version; &Description; 5.3.0 The constant ENT_IGNORE was added. 5.2.3 The double_encode parameter was added. 4.1.0 The charset parameter was added. 4.0.3 The flags parameter was added. &reftitle.examples; bold"; // Outputs: A 'quote' is <b>bold</b> echo htmlentities($str); // Outputs: A 'quote' is <b>bold</b> echo htmlentities($str, ENT_QUOTES); ?> ]]> ]]> &reftitle.seealso; html_entity_decode get_html_translation_table htmlspecialchars nl2br urlencode