- substr: documentation ( source)
- strpos: documentation ( source)
<?php
function get_between($input, $start, $end)
{
$substr = substr($input, strlen($start)+strpos($input, $start), (strlen($input) - strpos($input, $end))*(-1));
return $substr;
}
$the_string = "some string here string_1--------string2 some string here string_1--------string2 some string here string_1--------string2";
$a = "string_1";
$b = "string2";
echo get_between($the_string,$a,$b);