PHP: htmlentities() function


The htmlentities() function is used to convert all applicable characters to HTML entities.


(PHP 4 and above)


htmlentities(input_string, quote_style, charset, double_encode )


Name Description Required /
input_string The string to be converted. Required String
quote_style Encoding single and double quote.
ENT_COMPAT : Convert double quotes and leave single quotes unchanged.
ENT_COMPAT is the default setting
ENT_QUOTES : Converts both single and double quotes.
ENT_NOQUOTES: Converts neither single nor double quotes.
Optional Integer
charset Refers the character set to be used.
List of character set.
ISO-8859-1 : Western European, Latin-1 [default character set].
ISO-8859-15 : Western European, Latin-9. 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.
GB2312 : Simplified Chinese.
BIG5-HKSCS : Big5 with Hong Kong extensions.
Shift_JIS : Japanese.
EUC-JP : Japanese.
Optional String
double_encode Converts nothing when double_encode is off. The default is to convert everything. Optional Boolean

Return values:

The encoded string.

Value Type: String.


$convert = htmlentities("<li><a href='index.php'>We are learning php</a></li>", ENT_QUOTES); 
echo $convert;


<li><a href='index.php'>We are learning   php</a></li>

View the example in the browser

See also

PHP Function Reference

Previous: html_entity_decode
Next: htmlspecialchars_ decode

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PHP: Tips of the Day

Constants can be defined inside classes using a const keyword.


class Foo {
 const BAR_TYPE = "bar";
 // reference from inside the class using self::
 public function myMethod() {
 return self::BAR_TYPE;
// reference from outside the class using <ClassName>::
echo Foo::BAR_TYPE;



This is useful to store types of items.

class Logger {
 const LEVEL_INFO = 1;
 const LEVEL_WARNING = 2;
 const LEVEL_ERROR = 3;
 // we can even assign the constant as a default value
 public function log($message, $level = self::LEVEL_INFO) {
 echo "Message level " . $level . ": " . $message;
$logger = new Logger();
$logger->log("Info"); // Using default value
$logger->log("Warning", $logger::LEVEL_WARNING); // Using var
$logger->log("Error", Logger::LEVEL_ERROR); // using class



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