php array empty - how to get NOT

Question

if($_POST['cropProfileData'] == undefined || $_POST['cropProfileData'] == null || $_POST['cropProfileData'] == 0) {
    echo "NO process profile photo....";
}else{
    echo "YES process profile photo....";
}

this works fine - it shows me if the array is empty.

The catch is I only need the 'echo "YES process profile photo...".

How can I get the NOT of the above IF statement? I've tried added '!' after the if - eg: if!( and I've tried added '!' after each of the 3 statements.

Is there a way to get the NOT of this statement - will save me a having to include the else which is pointless code.

thx

PS: the reason for this is to see if the array is empty.

You have posted PHP code, but tagged it with "jQuery". There is no PHP vlaue like undefined Well, it's monday… — feeela
– feeela, Commented May 6, 2013 at 8:00
Have you tried this - $_POST['cropProfileData'] != undefined || — Adil Shaikh
– Adil Shaikh, Commented May 6, 2013 at 8:00

JJJ · Accepted Answer · 2013-05-06 08:02:49Z

4

Just !empty( $_POST[ 'cropProfileData' ] ) will cover all those cases (although undefined is not used in PHP unless it's some constant).

if( !empty( $_POST[ 'cropProfileData' ] ) ) {
    echo "YES process profile photo....";
}

answered May 6, 2013 at 8:02

JJJ

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1 Comment

Ja͢ck Over a year ago

This doesn't strictly check for a non-empty array.

Ja͢ck · Accepted Answer · 2013-05-06 08:44:07Z

Theory

The negative expression is simply this:

if (!($_POST['cropProfileData'] == undefined || $_POST['cropProfileData'] == null || $_POST['cropProfileData'] == 0)) {

According to De Morgan, the expression could also be written as:

if ($_POST['cropProfileData'] != undefined && $_POST['cropProfileData'] != null && $_POST['cropProfileData'] != 0) {

Practice

To test if something is undefined you should use isset(), for example:

$_POST['cropProfileData'] == undefined || $_POST['cropProfileData'] == null

Should be written as:

!isset($_POST['cropProfileData'])

To specifically test if an array is not empty:

isset($_POST['cropProfileData']) && is_array($_POST['cropProfileData']) && count($_POST['cropProfileData'])

Or, simpler:

if (!empty($_POST['cropProfileData']) && is_array($_POST['cropProfileData'])) {

Hanky Panky · Accepted Answer · 2013-05-06 08:04:36Z

1

<?php

/*
if($a == undefined || $b == null || $c == 0) {
    echo "NO process profile photo....";
}else{
    echo "YES process profile photo....";
}
*/


if($a != undefined && $b != null && $c != 0) {
    echo "NO process profile photo....";
}else{
    echo "YES process profile photo....";
}


?>

answered May 6, 2013 at 8:04

Hanky Panky

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Comments

Er.KT · Accepted Answer · 2013-05-06 08:05:31Z

1

You just need to check that array is empty or not

like

if(!empty( $_POST[ 'cropProfileData' ] )){echo "YES process profile photo....";}

answered May 6, 2013 at 8:05

Er.KT

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