PHP & MySQL - How to check if an array is empty or not in a function

Question

I was wondering how can I check if an array is empty or not in a function

Here is part of my code.

if (!mysqli_query($dbc, $sql)) {
        trigger_error(mysqli_error($dbc));
        return;
} else {
    $t = array();
    while($row = mysqli_fetch_array($result)) {
        $t[] = $row[0];
    }
}

if($tr > 0){
    $ts = array_sum($t);
}

$t[] = $row[0] is going to give the same value to every element in the $t array. You need to put a counter in there. — JakeParis
– JakeParis, Commented Dec 22, 2010 at 19:07
if (empty($array)) and it doesn't matter inside of function or not — Your Common Sense
– Your Common Sense, Commented Dec 22, 2010 at 19:07
@Col. Shrapnel, "not in a function" but "if an array is empty or not" — HELP
– HELP, Commented Dec 22, 2010 at 19:10
@tang, before the while statment you could put ` $i = 0 ` then inside the while loop, you would put ` $t[] = $row[$i]; $i++ ` — JakeParis
– JakeParis, Commented Dec 22, 2010 at 19:10

Veign · Accepted Answer · 2010-12-22 19:06:55Z

1

Use the empty() function: http://php.net/manual/en/function.empty.php

answered Dec 22, 2010 at 19:06

Veign

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1 Comment

netcoder Over a year ago

Not a function, but a language construct. Slightly different.

Elle H · Accepted Answer · 2010-12-22 19:07:21Z

1

Loose equivalency checking returns false on an empty array

if(array()) // returns false

http://php.net/manual/en/types.comparisons.php

answered Dec 22, 2010 at 19:07

Elle H

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Comments

Andrew Sledge · Accepted Answer · 2010-12-22 19:06:23Z

0

Use count() to count the number of elements in the array.

answered Dec 22, 2010 at 19:06

Andrew Sledge

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Community · Accepted Answer · 2023-11-17 20:29:45Z

0

An easy method would be to use the count function.

For example:

if(count($sourceArray) != 0) {
    // Do exciting things here...
}

edited Nov 17, 2023 at 20:29

CommunityBot

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answered Dec 22, 2010 at 19:07

John Parker

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Oswald · Accepted Answer · 2010-12-22 19:07:15Z

0

empty($t);

gives you true if $t is considered empty.

answered Dec 22, 2010 at 19:07

Oswald

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Hamdi · Accepted Answer · 2010-12-22 19:44:27Z

0

To check if array is empty:

if (sizeof($arr) == 0)
{
    //Empty array
}

To check whether an element exists in an array or not:

if (in_array($element, $arr))
{
     //Element found in the array
}

answered Dec 22, 2010 at 19:44

Hamdi

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