htmlspecialchars Convert special characters to HTML entities &reftitle.description; stringhtmlspecialchars stringstring intflagsENT_COMPAT stringcharset booldouble_encodetrue Certain characters have special significance in HTML, and should be represented by HTML entities if they are to preserve their meanings. This function returns a string with some of these conversions made; the translations made are those most useful for everyday web programming. If you require all HTML character entities to be translated, use htmlentities instead. This function is useful in preventing user-supplied text from containing HTML markup, such as in a message board or guest book application. The translations performed are: '&' (ampersand) becomes '&amp;' '"' (double quote) becomes '&quot;' when ENT_NOQUOTES is not set. ''' (single quote) becomes '&#039;' only when ENT_QUOTES is set. '<' (less than) becomes '&lt;' '>' (greater than) becomes '&gt;' &reftitle.parameters; string The string being converted. flags The optional second argument, flags, tells the function what to do with single and double quote characters and with invalid multi-byte sequences. The default mode, ENT_COMPAT, is the backwards compatible mode which only translates the double-quote character and leaves the single-quote untranslated. If ENT_QUOTES is set, both single and double quotes are translated and if ENT_NOQUOTES is set neither single nor double quotes are translated. In addition, since 5.3.0, these constants can be combined with ENT_IGNORE. In that case, strings that contain invalid code unit sequences have those invalid sequences discarded instead of having the function return an empty string. charset Defines character set used in conversion. The default character set is ISO-8859-1. For the purposes of this function, the charsets ISO-8859-1, ISO-8859-15, UTF-8, cp866, cp1251, cp1252, and KOI8-R are effectively equivalent, as the characters affected by htmlspecialchars occupy the same positions in all of these charsets. &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; The converted string. &reftitle.changelog; &Version; &Description; 5.2.3 The double_encode parameter was added. 4.1.0 The charset parameter was added. &reftitle.examples; Test", ENT_QUOTES); echo $new; // <a href='test'>Test</a> ?> ]]> &reftitle.notes; Note that this function does not translate anything beyond what is listed above. For full entity translation, see htmlentities. &reftitle.seealso; get_html_translation_table htmlspecialchars_decode strip_tags htmlentities nl2br