String Functions in PHP: Part 6

Introduction

In this article I describe the PHP string functions html_entity_decode, htmlentities and htmlspecialchars_decode. To learn some other math functions, go to:

1. String Functions in PHP: Part1
   
2. String Functions in PHP:Part2 
3. String Functions in PHP:Part3
   
4. String Functions in PHP:Part4 
5. String Functions in PHP:Part5

PHP html_entity_decode() Function

The PHP string html_entity_decode function converts all HTML entities to their applicable characters.

Syntax

html_entity_decode(string, quotestyle,character-set)

Parameter in html_entity_decode Function

The parameters of the html_entity_decode function are:

Parameter	Description
string	It specifies the input string.
quotestyle	It specifies how to decode single or double quotes. The possible quote styles are: ENT_COMPAT - Default. Decodes only double quotes. ENT_QUOTES - Decodes double and single quotes. ENT_NOQUOTES - Does not decode any quotes. ENT_HTML401 - Handle code as HTML 4.01. ENT_XML1 - Handle code as XML1.
character-set	It specifies a string that specifies what character set is used.

Example

An example of the html_entity_decode function is: 

<?php

$str = "We are learning <b>PHP</b> at <a href='http://www.c-sharpcorner.com/1/279/php.aspx'>C-sharpCorner.com</a>";

echo html_entity_decode($str);

?>

Output

 

PHP htmlentities() Function

The PHP string htmlentities function converts all applicable characters to HTML entities.

Syntax

htmlentities (string, quotestyle,character-set)

Parameter in htmlentities Function

The parameters of the htmlentities  function are:

Parameter	Description
string	It specifies the string to convert.
quotestyle	It specifies how to encode single or double quotes. The possible quote styles are: ENT_COMPAT - Default. Decodes only double quotes. ENT_QUOTES - Decodes double and single quotes. ENT_NOQUOTES - Does not decode any quotes. ENT_HTML401 - Handle code as HTML 4.01. ENT_XML1 - Handle code as XML1.
character-set	It specifies a string that specifies what character set is used.

Example

An example of the htmlentities function is: 

<?php

$str = "MCN Solution at <b>India</b>";

echo "With Out htmlentities Function:". $str."</br>";

echo "When use htmlentities Function:" .htmlentities($str);

?>

Output


 

PHP htmlspecialchars_decode() Function

The PHP string htmlspecialchars_decode function converts special HTML entities back to characters.

Syntax

htnlspecialchars_decode (string, quotestyle)

Parameter in htmlspecialchars_decode Function

The parameters of the htmlspecialchars_decode function are:

Parameter	Description
string	It specifies the string to decode.
quotestyle	It specifies how to decode single or double quotes. And quote style are ENT_COMPAT - Default. Decodes only double quotes. ENT_QUOTES - Decodes double and single quotes. ENT_NOQUOTES - Does not decode any quotes. ENT_HTML401 - Handle code as HTML 4.01. ENT_XML1 - Handle code as XML1.

Example

An example of the htmlspecialchars_decode function is: 

<?php

$input_string = "&#169 C-sharpcorner.com";

echo 'After decoding : '.htmlspecialchars_decode($input_string) .'<br>';

$input_string = "&lt;table&gt;We are learning php&lt;/td&gt;<br>&lt;/tr&gt;<br>&lt;/table&gt;";

echo 'After decoding : '.htmlspecialchars_decode($input_string) .'<br>';

?>
 

Output