find the position of last occurrence of sub string in a string with limit of ending index

Question

I have a string like

$string="abc @def @xyz $ @def @xyz";

Now i want to get index of last occurrence of @ before $.

Currently i am using

strrpos($string,'@');

Third parameter of strrpos will be starting index, can we give ending index?

Answer 1

Using strrpos you can get the last occurrence. More about function.strrpos

For your purpose, you need to explode your string with $ and start the application of strrpos for the first index of exploded array.

Try this:

$string="abc @def @xyz $ @def @xyz";
$strArr = explode('$', $string);
$pos = strrpos($strArr[0], "@");

if ($pos === false) { // note: three equal signs
    echo 'Not Found!';
}else
    echo $pos; //Output 9 this case