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。
1. explode与split比较
都用字符进行分割，执行10次
代码：
for($num=0;$num <p>结果：</p> <p>explode takes 0.009193<br> explode takes 0.007066<br> explode takes 0.007623<br> explode takes 0.005829<br> explode takes 0.005497<br> explode takes 0.005734<br> explode takes 0.005502<br> explode takes 0.005515<br> explode takes 0.005524<br> split takes 0.008976<br> split takes 0.008971<br> split takes 0.009030<br> split takes 0.009173<br> split takes 0.009913<br> split takes 0.012656<br> split takes 0.012153<br> split takes 0.009161<br> split takes 0.008948</p> <p>结论：都用字符进行分割的情况下，explode性能优于split</p> <p> </p> <p>split用正则进行分割：</p> <p>代码：</p> <pre class="brush:php;toolbar:false">for($num=0;$num <p><br> 结果：</p> <p>explode takes 0.005649<br> explode takes 0.005719<br> explode takes 0.005792<br> explode takes 0.005975<br> explode takes 0.005723<br> explode takes 0.005812<br> explode takes 0.005860<br> explode takes 0.005756<br> explode takes 0.005835<br> split takes 0.005158<br> split takes 0.005170<br> split takes 0.005440<br> split takes 0.005402<br> split takes 0.005272<br> split takes 0.005434<br> split takes 0.006389<br> split takes 0.005414<br> split takes 0.005510</p> <p>结论：在split使用正则分割的情况下，两者性能不相上下</p> <p>2. split与preg_split比较</p> <p>代码：</p> <pre class="brush:php;toolbar:false">for($num=0;$num <p><br> 结果：</p> <p>split takes 0.005381<br> split takes 0.005568<br> split takes 0.005107<br> split takes 0.005097<br> split takes 0.005444<br> split takes 0.005538<br> split takes 0.005095<br> split takes 0.005112<br> split takes 0.005087<br> preg_split takes 0.009364<br> preg_split takes 0.009568<br> preg_split takes 0.009037<br> preg_split takes 0.008957<br> preg_split takes 0.009021<br> preg_split takes 0.009656<br> preg_split takes 0.009038<br> preg_split takes 0.008962<br> preg_split takes 0.009412</p> <p>结论：split性能优于preg_split</p><p class="item-note"><br></p>
