w3resource

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

PHP Function Reference

Previous: html_entity_decode
Next: htmlspecialchars_ decode



PHP: Tips of the Day

PHP: Using str_replace so that it only acts on the first match?

Can be done with preg_replace: 

function str_replace_first($from, $to, $content)
{
    $from = '/'.preg_quote($from, '/').'/';

    return preg_replace($from, $to, $content, 1);
}

echo str_replace_first('abc', '123', 'abcdef abcdef abcdef'); 
// outputs '123def abcdef abcdef'

The magic is in the optional fourth parameter [Limit]. From the documentation:

[Limit] - The maximum possible replacements for each pattern in each subject string. Defaults to -1 (no limit).

Ref : https://bit.ly/35SCuP8