更棒的是在PHP $数组[] = $值或array_push（$数组$值）来使用？ [英] What's better to use in PHP $array[] = $value or array_push($array, $value)?

问题描述

什么是最好的PHP用于追加数组成员 $数组[] = $值或 array_push（$数组$值）？

What's better to use in PHP for appending an array member $array[] = $value or array_push($array, $value) ?

虽然手册上说你最好避免函数调用，我也看到了 $数组[] 比慢得多array_push（）。没有人有任何澄清或基准？

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?

推荐答案

没有基准，但我个人觉得像 $数组[] 是清洁一下，老老实实在毫秒鸡蛋里挑骨头是pretty无关，除非你打算追加十万串到你的数组中。

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.

修改：这冉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;

使用第一种方法 $数组[] 比第二个快了近50％。

The first method using $array[] is almost 50% faster than the second one.

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[]

这并不奇怪，因为PHP手册注意事项如下：

This shouldn't be surprising, as the PHP manual notes this:

如果您使用array_push（）将一个元素添加到阵列中，最好使用$数组[] =，因为这样没有调用函数的开销。

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.

这是措辞，我不会感到惊讶，如果 array_push 添加多个值时，更有效的方式。 修改：出于好奇，做了一些进一步的测试，甚至对于大量增加，个别 $数组[] 通话更快不止一个大 array_push 。有意思的。

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.

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