How to delete element by value in array not key using php

0 votes

I have a PHP array as follows:

$messages = [312, 401, 1599, 3, ...];

I want to delete the element containing the value $del_val (for example, $del_val=401), but I don't know its key. This might help: each value can only be there once.

I'm looking for the simplest function to perform this task.

Sep 16, 2020 in PHP by kartik
• 37,510 points
692 views

1 answer to this question.

0 votes

Hello @kartik,

Using array_search() and unset, try the following:

if (($key = array_search($del_val, $messages)) !== false) {
    unset($messages[$key]);
}

array_search() returns the key of the element it finds, which can be used to remove that element from the original array using unset(). It will return FALSE on failure, however it can return a false-y value on success (your key may be 0 for example), which is why the strict comparison !== operator is used.

The if() statement will check whether array_search() returned a value, and will only perform an action if it did.

Hope it helpss!!
Thank you!!

answered Sep 16, 2020 by Niroj
• 82,820 points

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