It translate characters or replace substrings

Example

<?php
echo strtr(“One Two”,array(“One” => “PHP”, “Two” => “HTML”));
?>

Output

PHP HTML

It makes a string uppercase

Example

<?php
echo strtoupper(“PHPCode”);
?>

Output

PHPCODE

It makes a string lowercase

Example

<?php
echo strtolower(“PHPCode”);
?>

Output

phpcode

It splits a string into smaller strings

Example

<?php
$tokenVal = strtok(“php html js”, ” “);
while ($tokenVal  != false) {
echo $tokenVal .” “;
$tokenVal =strtok(” “);
}
?>

Output

php html js

It finds the first occurrence of a string

Example

<?php
echo strstr(“phpcode”,”co”);
?>

Output

code

It returns the number of characters found in the string that contains only characters from the charlist.

Example

<?php
echo strspn(“phpcodephp”,”phpe”);
?>

Output

3

It finds the position of the last occurrence of a  substring in a string

Example

<?php
echo strrpos(“phpcodeccr”,”p”);
?>

Output

2

It find the position of the last occurrence of a  substring in a string(case-insensitive)

Example

<?php
echo strripos(“phpcodeccr”,”c”);
?>

Output

8

It reverse a string

Example

<?php
echo strrev(“phpcodeccr”);
?>

Output

rccedocphp

It finds the last occurrence of a character in a string

Example

<?php
echo strrchr(“phpcodeccr”,”co”);
?>

Output

cr