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
 )
)

Answer 1

A simple foreach counter should do:

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

No need to over complicate things

• azzy81: 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: 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: @SubstanceD we all have those moments

Answer 2

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)

• Petah: This is a lot slower than using a simple foreach loop though
• smad: How can it be slower? Have you do measurements?
• azzy81: 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 =)

Answer 3

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.