1200字范文 > PHP字符分割explode split preg_split性能比较

PHP字符分割explode split preg_split性能比较

时间：2020-04-25 11:51:15

后端开发|php教程

php, php技巧, php性能

后端开发-php教程

PHP字符分割explode，split，preg_split性能比较

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三个函数都是用来对字符串进行分割，下面分几个实验来比较之间的性能。

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1. explode与split比较

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都用字符进行分割，执行10次

代码：

for($num=0;$num<9;$num++){ $stime=microtime(); for($i=0;$i<10000;$i++) { explode(,,hello,world); } $etime=microtime(); printf("explode takes %f \n",$etime-$stime);}for($num=0;$num<9;$num++){ $stime=microtime(); for($i=0;$i<10000;$i++) { split(,,hello,world); } $etime=microtime(); printf("split takes %f \n",$etime-$stime);}

结果：

explode takes 0.009193

explode takes 0.007066

explode takes 0.007623

explode takes 0.005829

explode takes 0.005497

explode takes 0.005734

explode takes 0.005502

explode takes 0.005515

explode takes 0.005524

split takes 0.008976

split takes 0.008971

split takes 0.009030

split takes 0.009173

split takes 0.009913

split takes 0.012656

split takes 0.012153

split takes 0.009161

split takes 0.008948

结论：都用字符进行分割的情况下，explode性能优于split

split用正则进行分割：

代码：

for($num=0;$num<9;$num++){ $stime=microtime(); for($i=0;$i<10000;$i++) { explode(,,hello,world); } $etime=microtime(); printf("explode takes %f \n",$etime-$stime);}for($num=0;$num<9;$num++){ $stime=microtime(); for($i=0;$i<10000;$i++) { split(/,/,hello,world); } $etime=microtime(); printf("split takes %f \n",$etime-$stime);}

结果：

explode takes 0.005649

explode takes 0.005719

explode takes 0.005792

explode takes 0.005975

explode takes 0.005723

explode takes 0.005812

explode takes 0.005860

explode takes 0.005756

explode takes 0.005835

split takes 0.005158

split takes 0.005170

split takes 0.005440

split takes 0.005402

split takes 0.005272

split takes 0.005434

split takes 0.006389

split takes 0.005414

split takes 0.005510

结论：在split使用正则分割的情况下，两者性能不相上下

2. split与preg_split比较

代码：

for($num=0;$num<9;$num++){ $stime=microtime(); for($i=0;$i<10000;$i++) { split(/,/,hello,world); } $etime=microtime(); printf("split takes %f \n",$etime-$stime);}for($num=0;$num<9;$num++){ $stime=microtime(); for($i=0;$i<10000;$i++) { preg_split("/,/","hello,world"); } $etime=microtime(); printf("preg_split takes %f \n",$etime-$stime);}

结果：

split takes 0.005381

split takes 0.005568

split takes 0.005107

split takes 0.005097

split takes 0.005444

split takes 0.005538

split takes 0.005095

split takes 0.005112

split takes 0.005087

preg_split takes 0.009364

preg_split takes 0.009568