Regarding the efficiency issue of php address reference

This article mainly introduces the php address reference (the efficiency issue of php address reference), which has a certain reference value. Now I share it with you. Friends in need can refer to

php address reference. To share efficiency issues, friends who are learning PHP can take a look at

';//begin to count time $array=array(); for ($i=1;$i<=10000;$i++) {//产生一个很大的数组 $array[$i]=$i; } /* $arr=$array;//拷贝 拷贝并打印总时间0.02 foreach ($arr as $ar) { echo $ar.'
'; } */ /* $newarr=&$array;//地址引用 时间总是控制在0.01之内 地址引用的优势体现出来了 foreach ($newarr as $r) { echo $r.'
'; } */ foreach ($array as $a) {//基本是0.02 很少是0.01 为什么没有地址引用的快呢？纳闷 echo $a.'
'; } echo 'end time:'.$end=microtime(false).'
';//end to count time echo 'total time:'.($end-$begin); ?>

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