php数组常见的几种遍历方法

1、foreach遍历

$arr[] = array('first'=>green,'second'=>'yellow','third'=>'blue');

foreach($arr as $key=>$val){

     echo $key.'-'.$val;

     echo ' ';

}

输出结果：

first-green

second-yellow

third-blue

 

2、while-each遍历

$arr[] = array('first'=>green,'second'=>'yellow','third'=>'blue');

while($element = each($arr)){

     echo $element ['key'].'-'.$element [value].;

     echo ' ';

}

输出结果：

first-green

second-yellow

third-blue

 

2、while-list-each遍历

$arr[] = array('first'=>green,'second'=>'yellow','third'=>'blue');

while(list($key,$val) = each($arr)){

     echo $key.'-'.$val;

     echo ' ';

}

输出结果：

first-green

second-yellow

third-blue

 

注意：以上遍历中的each()函数，数组将记录当前元素，若要重新遍历数组，则要使用reset()函数重新设置数组指针到数组的开始处。