php中清除数组的某个单元
php中清除数组的某个单元要用unset(),不能用其他方式,例子如下: <?php $stu[0]="张三"; $stu[1]="李四"; $stu[2]="王五"; //清除李四这个单元 //$stu[1]=null;//赋值null结果不行 //$stu[1]='';//赋值空字符串结果也不行,空字符串也是一个值 //$stu[1]=false;//赋值bool值false结果也不行 unset($stu[1]); print_r($stu);

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