PHP: htmlentities() function
Description
The htmlentities() function is used to convert all applicable characters to HTML entities.
Version:
(PHP 4 and above)
Syntax:
htmlentities(input_string, quote_style, charset, double_encode )
Parameters:
Name | Description | Required / Optional |
Type |
---|---|---|---|
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.
Example:
<?php
$convert = htmlentities("<li><a href='index.php'>We are learning php</a></li>", ENT_QUOTES);
echo $convert;
?>
Output:
<li><a href='index.php'>We are learning php</a></li>
View the example in the browser
See also
Previous: html_entity_decode
Next: htmlspecialchars_ decode
PHP: Tips of the Day
Constants can be defined inside classes using a const keyword.
Example:
class Foo { const BAR_TYPE = "bar"; // reference from inside the class using self:: public function myMethod() { return self::BAR_TYPE; } } // reference from outside the class using <ClassName>:: echo Foo::BAR_TYPE;
Output:
bar
This is useful to store types of items.
<?php class Logger { const LEVEL_INFO = 1; const LEVEL_WARNING = 2; const LEVEL_ERROR = 3; // we can even assign the constant as a default value public function log($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
Output:
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