PHP: Hypertext Preprocessor (original) (raw)

`I really searched for a function that would do this as I've seen it in other languages but I couldn't find it here. This is particularily useful when combined with substr() to take the first part of a string up to a certain point.

strnpos() - Find the nth position of needle in haystack.

needle,needle, needle,occurance, $pos = 0) { for ( i=1;i = 1; i=1;i <= occurance;occurance; occurance;i++) { pos=strpos(pos = strpos(pos=strpos(haystack, needle,needle, needle,pos) + 1; } return $pos - 1; } ?>

Example: Give me everything up to the fourth occurance of '/'.

needle="/";needle = "/";needle="/";root_dir = substr($haystack, 0, strnpos($haystack, $needle, 4)); echo $root_dir;?>

Returns: /home/username/www

Use this example with the server variable $_SERVER['SCRIPT_NAME'] as the haystack and you can self-discover a document's root directory for the purposes of locating global files automatically!