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How to use php html_entity_decode function

青灯夜游

Release： 2023-02-22 20:26:01

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html_entity_decode() function is used to convert HTML entities into characters. The syntax is html_entity_decode(string, flags, character-set).

How to use php html_entity_decode function

php How to use the html_entity_decode() function?

html_entity_decode() function converts HTML entities into characters.

Syntax

html_entity_decode(string,flags,character-set)

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Parameters:

1, string: required. Specifies the string to decode.

2. flags: optional. Specifies how quotation marks are handled and which document type is used.

Available quote types:

● ENT_COMPAT - Default. Only double quotes are decoded.

●　ENT_QUOTES - Decode double and single quotes.

●　ENT_NOQUOTES - Do not decode any quotes.

Additional flags specifying the document type used:

●　ENT_HTML401 - Default. Code processed as HTML 4.01.

●　ENT_HTML5 - Process code as HTML 5.

●　ENT_XML1 - As XML 1 processing code.

●　ENT_XHTML - as XHTML processing code.

3. character-set: optional. String value specifying the character set to use. Allowed values:

●　UTF-8 - Default. ASCII compatible multi-byte 8-bit Unicode

● ISO-8859-1 - Western Europe

● ISO-8859-15 - Western Europe (added euro symbol to ISO-8859-1 Missing French and Finnish letters)

● cp866 - DOS-specific Cyrillic character set

● cp1251 - Windows-specific Cyrillic character set

● cp1252 - Windows-specific Western European character set

●　KOI8-R - Russian

●　BIG5 - Traditional Chinese, mainly used in Taiwan

●　GB2312 - Simplified Chinese, national standard character set

● BIG5-HKSCS - Big5 with Hong Kong extension

● Shift_JIS - Japanese

● EUC-JP - Japanese

● MacRoman - Character set used by Mac operating systems

Note: In versions prior to PHP 5.4, unrecognized character sets will be ignored and replaced by ISO-8859-1. As of PHP 5.4, unrecognized character sets are ignored and replaced by UTF-8.

Return value: Return the converted string

Let’s take an example to see how to use the php strstr() function.

Example 1: Convert HTML entities to characters

<?php
$str = "Bill & &#039;Steve&#039;";
echo html_entity_decode($str, ENT_COMPAT); // 只转换双引号
echo "<br>";
echo html_entity_decode($str, ENT_QUOTES); // 转换双引号和单引号
echo "<br>";
echo html_entity_decode($str, ENT_NOQUOTES); // 不转换任何引号
?>

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Output:

How to use php html_entity_decode function

Example 2: Convert HTML entities to characters by using Western European character sets

<?php
$str = "My name is Øyvind Åsane. I&#39;m Norwegian.";
echo html_entity_decode($str, ENT_QUOTES, "ISO-8859-1");
?>

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HTML output of the above code (view source code):

<!DOCTYPE html>
<html>
<body>
My name is ?yvind ?sane. I&#39;m Norwegian.
</body>
</html>

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Browser output of the above code :

My name is ?yvind ?sane. I&#39;m Norwegian.

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