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How to delete an element of an array in php
- PHPzOriginal
- 2023-04-26 09:13:46532browse
In PHP, you can use the unset() or array_splice() function to delete an element of an array. The unset() function is used to delete specified array elements, while the array_splice() function is used to delete array elements within a specified range.
Method 1: Use the unset()
unset() function to delete the specified element in the array. The syntax of this function is as follows:
unset($array[$key]);
Among them, $array is the array of elements to be deleted, and $key is the key of the element to be deleted.
The following is a sample code:
$fruits = array("apple", "mango", "banana", "orange");
unset($fruits[2]); // 删除 "banana"
print_r($fruits); // 输出 Array([0] => apple [1] => mango [3] => orange)
In the above code, we delete the element with key 2 in the array $fruits, which is "banana".
Method 2: Use array_splice()
The array_splice() function is used to delete elements within a specified range in the array, and can insert new elements while deleting. The syntax of this function is as follows:
array_splice($array, $start, $length);
Among them, $array is the array of elements to be deleted, $start is the starting position of the elements to be deleted, and $length is the number of elements to be deleted.
The following is a sample code:
$fruits = array("apple", "mango", "banana", "orange");
array_splice($fruits, 2, 1); // 删除 "banana"
print_r($fruits); // 输出 Array([0] => apple [1] => mango [2] => orange)
In the above code, we delete 1 element starting from index 2 in the array $fruits, which is "banana". Note that this function can only delete consecutive elements and cannot delete non-consecutive elements.
Summary
Whether you use the unset() function or the array_splice() function, deleting an element of the array is very simple. The former is suitable for deleting a single element, and the latter is suitable for deleting multiple consecutive elements. Which method to use depends on your specific needs.
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