php remove first element of array

php method to remove the first element of an array: 1. Use the array_shift() function to delete an element at the beginning of the array, the syntax is "array_shift($arr)"; 2. Use the array_splice() function, the syntax "array_splice($arr,0,1)"; 3. Use the array_slice() function, the syntax is "array_slice($arr,1)".

The operating environment of this article: Windows 7 system, PHP 8 version, DELL G3 computer.

Method 1: Use the array_shift() function

Create a PHP file and define an array, example:

$arr = array('apple', 'orange', 'banana', 'watermelon');

Format and output the original content of the array, example:

echo &#39;<pre class="brush:php;toolbar:false">&#39;;
print_r($arr);
echo &#39;<pre class="brush:php;toolbar:false">&#39;;

Save the above file and preview the original array content on the screen

Use array_shift() to delete the first element in the array, example:

echo array_shift($arr);

Save the above content and preview it on the screen again, The deleted element value will be printed on the screen

#Format and output the data in the array after the first element is deleted

Save the above content and preview the final effect

Method 2: Use the array_splice() function

## The #array_splice() function is used to delete part of the elements of the array; you can delete them directly or replace them with other values.

Example: Delete the first element in the array

<?php
header("Content-type:text/html;charset=utf-8");
$arr=array(10,12,20,25,24);
echo "原数组：";
var_dump($arr);

array_splice($arr, 0,1);

echo "删除后的数组：" ;
var_dump($arr);
?>

Method 3: Use the array_slice() function

array_slice() function is used to intercept an array, that is, to extract a fragment from the array.

Return value: Return the intercepted subarray.

<?php
header("Content-type:text/html;charset=utf-8");
$arr=array(12,20,25,24,26);
echo "原数组：";
var_dump($arr);

echo "删除后的数组：" ;
var_dump(array_slice($arr, 1));
?>

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