It calculates the md5 hash of a string

Example

<?php
echo md5(“test”);
?>

Output

098f6bcd4621d373cade4e832627b4f6

It calculates the md5 hash of a given file

Example

<?php
echo md5_file(“test.txt”);
?>

Output

be6f273c2ae6f2740e395f525bf8b645

It strips whitespace from the beginning of a string

Example

<?php
echo ltrim(” phpcode”);
?>

Output

phpcode

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 >