- strpos: documentation ( source)
- microtime: documentation ( source)
<?php
$s = "";
for($i = 0; $i < 1024; $i++)
$s = $s . ($i % 10);
$start = microtime();
for($i = 0; $i < 10000; $i++)
strpos($s, "abcdef");
$end = microtime();
echo "Duration: " . ($end - $start) . " s\n";
?>