It returns numeric formatting information

Example

<?php
print_r(localeconv());
?>

It calculate Levenshtein distance between two strings

Example

<?php
echo levenshtein(“phpcode”,”phpcodez”);
?>

Output

1

It make a string’s first character lowercase

Example

<?php
echo lcfirst(“PHPcode”);
?>

Output

pHPcode

Its an alias of implode() and joins array elements with a string

Example

<?php
$arry = array(“PHP”,”HTML”,”JS”);
echo join(“,”,$arry);
?>

Output

PHP,HTML,JS

It joins array elements with a string

Example

<?php
$arry = array(“PHP”,”HTML”,”JS”);
echo implode(“,”,$arry);
?>

Output

PHP,HTML,JS

It converts predefined characters to HTML entities.  The predefined characters are:

• & (ampersand) becomes &amp;
• ” (double quote) becomes &quot;
• ‘ (single quote) becomes &#039;
• < (less than) becomes &lt;
• > (greater than) becomes &gt;

Example

<?php
 echo htmlspecialchars("<a href='http://phpcodez.comt'>phpcode</a>");
 ?>

Output

<a href=’http://phpcodez.comt’>phpcode</a>

It convert special HTML entities back to characters

Example

<?php
echo htmlspecialchars_decode(“<p>php &gt”);
?>

Output

php >

It convert all applicable characters to HTML entities

Example

<?php
echo htmlentities(“<a>PHP<a> <br /> <p>HTML</p>”);
?>

Output

<a>PHP<a> <br /> <p>HTML</p>

It convert all HTML entities to their applicable characters

Example

<?php
echo html_entity_decode(“PHP &amp; HTML”);
?>

Output

PHP & HTML

It decodes a hexadecimally encoded binary string

Example

<?php
echo hex2bin(“d706c6520686578206461”);
?>