PHP function chopOffLastDir()
I wrote this funtion to help avoid 404 errors when a user asks for something like /my/site/section/doesntexist/. I use it to help bump users “up” to /my/site/section/. Feel free to use/modify/share it; I’m making it public domain.
<?php
/* chopOffLastDir v1.2
by Alan Hogan (alan.pixelsandpages.com)
This function, formerly known as allButLastBit,
is meant to chop off the last directory in a GET request.
Ex: chopOffLastDir("/about/website/php/")
returns "/about/website/"
Note: Accepts dirs in any of the following
forms (not including quotes):
"a/b/c"
"/a/b/c/"
"a/b/c/"
"/a/b/c"
However, it will always return this:
"/a/b/"
*/
function chopOffLastDir($string,$separator='/')
{
if ($string[0]!=$separator)
{
$string=$separator.$string;
}
if (substr($string,-1)!=$separator)
{
$string.=$separator;
}
$exploded = explode($separator,$string);
$numValues = count($exploded)-2;
for($n=0;$n<$numValues;$n++)
{
$output.=$exploded[$n].$separator;
}
return $output;
}
?>
Comments
Note
I would like to point out the basename() function of PHP has a similar purpose. However this one may be useful for very simple CMSs.
Alan J. Hogan
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