Comments on: Removing empty elements from an array http://jelaniharris.com/2010/removing-empty-elements-from-an-array/ The original website of Jelani Harris the original of course Wed, 01 Feb 2012 12:13:40 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Mike http://jelaniharris.com/2010/removing-empty-elements-from-an-array/comment-page-1/#comment-79 Mike Fri, 07 May 2010 15:13:33 +0000 http://jelaniharris.com/?p=90#comment-79 I'll have to use that - I rely on isset() for a portion of my error checking in PHP, and it'd be useful to know that an array is already scrubbed of empty fields coming into the routine. You might find this useful, too - it's a routine I've been using to vet user input for SQL queries: function safeQueryParam($candidate = NULL){ $returnStr = NULL; $pattern = '/[^a-zA-Z0-9]/'; if($candidate) $tempStr = preg_replace($pattern, '', $candidate); if($tempStr != null && $tempStr != "") $returnStr = $tempStr; return $returnStr; } It removes any characters from the passed string that aren't in $pattern (for this application, I was only looking for alphanumeric characters). I’ll have to use that – I rely on isset() for a portion of my error checking in PHP, and it’d be useful to know that an array is already scrubbed of empty fields coming into the routine. You might find this useful, too – it’s a routine I’ve been using to vet user input for SQL queries:

function safeQueryParam($candidate = NULL){

$returnStr = NULL;
$pattern = ‘/[^a-zA-Z0-9]/’;

if($candidate)
$tempStr = preg_replace($pattern, ”, $candidate);

if($tempStr != null && $tempStr != “”)
$returnStr = $tempStr;

return $returnStr;

}

It removes any characters from the passed string that aren’t in $pattern (for this application, I was only looking for alphanumeric characters).

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