How to delete values ​​in a two-dimensional array in php

php method to delete values ​​in a two-dimensional array: you can use the foreach statement combined with the unset function to delete, such as [foreach($array as $key=>$value){if($key== 'a')[unset($array[$key]);]}].

The unset() function is used to clear and destroy variables. For unused variables, we can use unset() to destroy elements.

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The same principle as deleting a one-dimensional array, you can delete the corresponding element through the key name of the array.

Example:

<?php
$array = array(&#39;a&#39;=>array(&#39;a1&#39;,&#39;a2&#39;),&#39;b&#39;=>array(&#39;b1&#39;,&#39;b2&#39;));
foreach($array as $key=>$value){
if($key == &#39;a&#39;)[
unset($array[$key]);
}
//或者删除二维数组中二维中的元素
if($key == &#39;a&#39;)[
unset($array[$key][0]);
}
}
print_r($array);
?>

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