Re: IF statement question...

Jay Blanchard wrote:

[snip] Tipp: Do not use preg_match() if you only want to check if one string is contained in another string. Use strpos() or strstr() instead as they will be faster. [/snip] This brings up a good point. Just exactly how much faster would one be over another in this small example? How big would the string have to be to note any degredation of performance?

I wrote a small script to test this: 100000 Searches in a rather small string took 0.38s with strpos() and 0.55s with preg_match() While this is not too much in absolute time preg_match uses 145% of the strpos time. You can play with the script: <?php $haystack="This is a string. It is not really long, but I hope it is long enough for this test ;-)"; $needle="test"; function getmicrotime() {

    $time=microtime();
    list($usec, $sec) = explode(" ", $time);
    return ((float)$usec + (float)$sec);

} $t1=getmicrotime(); for($i=0;$i<100000;$i++)

    $pos=strpos($haystack,$needle);

$t2=getmicrotime(); for($i=0;$i<100000;$i++)

    preg_match("/".$needle."/",$haystack);

$t3=getmicrotime(); printf("Time for strpos: %1.2f s<br>",$t2-$t1); printf("Time for preg_match: %1.2f s<br>",$t3-$t2); ?> Oliver