htmlentities Convert all applicable characters to HTML entities &reftitle.description; stringhtmlentities stringstring intflagsENT_COMPAT | ENT_HTML401 stringencoding'UTF-8' 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 want to decode instead (the reverse) you can use html_entity_decode. &reftitle.parameters; string The input string. flags A bitmask of one or more of the following flags, which specify how to handle quotes, invalid code unit sequences and the used document type. The default is ENT_COMPAT | ENT_HTML401. 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. Using this flag is discouraged as it 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. encoding Like htmlspecialchars, htmlentities takes an optional third argument encoding which defines encoding used in conversion. If omitted, the default value for this argument is ISO-8859-1 in versions of PHP prior to 5.4.0, and UTF-8 from PHP 5.4.0 onwards. Although this argument is technically optional, you are highly encouraged to specify the correct value for your code. &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. If the input string contains an invalid code unit sequence within the given encoding an empty string will be returned, unless either the ENT_IGNORE or ENT_SUBSTITUTE flags are set. &reftitle.changelog; &Version; &Description; 5.4.0 The default value for the encoding parameter was changed to UTF-8. 5.4.0 The constants ENT_SUBSTITUTE, ENT_DISALLOWED, ENT_HTML401, ENT_XML1, ENT_XHTML and ENT_HTML5 were added. 5.3.0 The constant ENT_IGNORE was added. 5.2.3 The double_encode parameter was added. 4.1.0 The encoding 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