PHPで配列の要素を削除する方法の使い方まとめ

<?php
$tmp = &#39;324&#39;;
$arr = array(&#39;0&#39; => &#39;321&#39;,&#39;1&#39; => &#39;322&#39;,&#39;2&#39; => &#39;323&#39;,&#39;3&#39; => &#39;324&#39;,&#39;4&#39; => &#39;325&#39;,&#39;5&#39; => &#39;326&#39;,
);

<?php
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
)

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

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

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

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

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