How to delete elements based on the element value of an associative array in php

How to delete elements based on the element value of an associative array in php: You can delete it through the array_diff() function. The array_diff() function is used to compare the values ​​of two (or more) arrays and return the difference. The specific method is: [array_diff($array1, $array2)].

Function introduction:

(Recommended tutorial: php tutorial)

array_diff() function Used to compare the values ​​of two (or more) arrays and return the difference.

This function compares the values ​​​​of two (or more) arrays (key=>value in value), and returns a difference array, which includes all the arrays being compared (array1 ), but not in any other parameter array (array2 or array3, etc.).

Function syntax:

array_diff(array1,array2,array3...);

Parameter description:

• array1 Required. The first array to compare with other arrays

• array2 Required. The array to compare with the first array

• array3,... Optional. Other arrays compared to the first array

Code implementation:

<?php
$array1 = array("a" => "green", "red", "blue", "red");
$array2 = array("b" => "green");
$result = array_diff($array1, $array2);//这样就相当于删除$array1里的值为"green"的元素。
print_r($result);
?>

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