php 删除一维数组中某一个值元素的操作方法

<?php$tmp = '324';$arr = array('0' => '321','1' => '322','2' => '323','3' => '324','4' => '325','5' => '326',);

foreach( $arr as $k=>$v) { if($tmp == $v) unset($arr[$k]);}print_r($arr);?>

Array( [0] => 321 [1] => 322 [2] => 323 [4] => 325 [5] => 326)

foreach( $arr as $k=>$v) { if($tmp == $v) unset($arr[$k]);}$arr = array_values($arr);print_r($arr);?>

Array( [0] => 321 [1] => 322 [2] => 323 [3] => 325 [4] => 326)

foreach( $arr as $k=>$v) { if($tmp == $v) unset($arr[$k]);}$arr = array_merge($arr);print_r($arr);?>

Array( [0] => 321 [1] => 322 [2] => 323 [3] => 325 [4] => 326)

$key=array_search($tmp ,$arr);array_splice($arr,$key,1);var_dump($arr);

Array( [0] => 321 [1] => 322 [2] => 323 [3] => 325 [4] => 326)

$arr = array_merge(array_diff($arr, array($tmp)));var_dump($arr);

Array( [0] => 321 [1] => 322 [2] => 323 [3] => 325 [4] => 326)

$arr = array_merge(array_diff($arr, $tmp));var_dump($arr);