PHP count object property occurrences

Question

I have a PHP object like below and all I want to know whats the the easiest way to get a count of objects where the property 'typeId' = 3

Array
(
    [0] => ABC Object
        (
            [id] => 13
            [typeId] => 3
            [sortOrder] => 0
        )
    [1] => ABC Object
        (
            [id] => 12
            [typeId] => 2
            [sortOrder] => 0
        )
    [2] => ABC Object
        (
            [id] => 14
            [typeId] => 4
            [sortOrder] => 0
        )
    [3] => ABC Object
        (
            [id] => 15
            [typeId] => 3
            [sortOrder] => 0
        )
)

Petah · Accepted Answer · 2011-06-09 09:58:34Z

3

A simple foreach counter should do:

$count = 0;
foreach ($array as $object) {
    if ($object->typeId == 3) $count++;
}

No need to over complicate things

answered Jun 9, 2011 at 9:58

Petah

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3 Comments

azzy81 Over a year ago

straight forward, I guess I should of spent a bit more time trying to solve it myself. So simple when you know how. thanks =)

azzy81 Over a year ago

blimey im looking at this old question of mine now wondering how on earth I didnt know how to do this. I guess in the last 1.5 years Ive learnt alot and cant imagine me asking something so simple anymore hehe

Petah Over a year ago

@SubstanceD we all have those moments

smad · Accepted Answer · 2011-06-09 10:48:50Z

1

From my point of view, a much nicer solution is to use the array_filter function:

$newarray = array_filter( $old_array, function($object) { return $object->typeId == 3; } );

(note: inline functions only work since PHP 5.3)

answered Jun 9, 2011 at 10:48

smad

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3 Comments

Petah Over a year ago

This is a lot slower than using a simple foreach loop though

smad Over a year ago

How can it be slower? Have you do measurements?

azzy81 Over a year ago

Thanks for your answer, I did go with the foreach loop from Petah above but I didnt know about inline functions so I've learnt something else too. nice one =)

TJHeuvel · Accepted Answer · 2011-06-09 09:59:08Z

0

Just create a temporary variable called objectCount or something similar, loop through your array and when you find an object where the typeId equals 3 add 1 to objectCount.

answered Jun 9, 2011 at 9:59

TJHeuvel

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