What's better to use in PHP $array[] = $value or array
What's better to use in PHP for appending an array member $array[] = $value or array_push($array, $value) ?
Though the manual says you're better off to avoid a function call, I've also read $array[] is much slower than array_push() . Does anyone have any clarifications or benchmarks?
No benchmarks, but I personally feel like $array[] is cleaner to look at, and honestly splitting hairs over milliseconds is pretty irrelevant unless you plan on appending hundreds of thousands of strings to your array.
Edit : Ran this code:
$t = microtime(true);
$array = array();
for($i = 0; $i < 10000; $i++) {
$array[] = $i;
}
print microtime(true) - $t;
print '<br>';
$t = microtime(true);
$array = array();
for($i = 0; $i < 10000; $i++) {
array_push($array, $i);
}
print microtime(true) - $t;
The first method using $array[] is almost 50% faster than the second one.
Some benchmark results:
Run 1
0.0054171085357666 // array_push
0.0028800964355469 // array[]
Run 2
0.0054559707641602 // array_push
0.002892017364502 // array[]
Run 3
0.0055501461029053 // array_push
0.0028610229492188 // array[]
This shouldn't be surprising, as the PHP manual notes this:
If you use array_push() to add one element to the array it's better to use $array[] = because in that way there is no overhead of calling a function.
The way it is phrased I wouldn't be surprised if array_push is more efficient when adding multiple values. EDIT : Out of curiosity, did some further testing, and even for a large amount of additions, individual $array[] calls are faster than one big array_push . Interesting.
The main use of array_push() is that you can push multiple values onto the end of the array.
It says in the documentation:
If you use array_push() to add one element to the array it's better to use $array[] = because in that way there is no overhead of calling a function.
From the php docs for array_push :
Note: If you use array_push() to add one element to the array it's better to use $array[] = because in that way there is no overhead of calling a function.
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