str_split function
The str_split() function splits a string into an array.
to used to check give character comes or not in that input string
PHP Code:
<?
$vInput="addf";
$vStr=str_split($vInput);
for($i=0;$i<count($vStr);$i++)
{
if($vStr[i]=='d')
{
$vA++;
}
}
echo $vA++;
?>
output;
2