3-5 PHP自身能力性能测试之代码测==== ab比内置函数和自定义函数性能

<?php

$array1=array();
$array2=array();
for ($i=0;$i<rand(1000,2000);$i++){
    $array1[]=rand();
}
for ($y=0;$y<rand(1000,2000);$y++){

    $array2[]=rand();
}
$array_megred=array();
foreach ($array1 as $v){
    $array_megred[]=$v;
}
foreach ($array2 as $v2){
    if (!in_array($v2,$array_megred)){
        $array_megred[]=$v2;
    }
}
print_r($array_megred);

<?php
$array1=$array2=range(1000,2000);
echo sizeof($array1).‘<br>‘;
echo sizeof($array2).‘<br>‘;
shuffle($array1);
shuffle($array2);
print_r(array_merge($array1,$array2));