How to add elements to php array Array
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Add method: 1, use "array_unshift ($arr, value)" statement; 2, use "array_push ($arr, value)" statement; 3, use "array_pad ($arr, array length, value)" statement; 4, use "array_splice ($arr,0,0, value)".
Operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer
Add elements to the php array array
1. Use the array_unshift () function to insert one or more new elements at the beginning of the array
Output result:
2. Use the array_push () function to insert one or more new elements at the end of the array
The output is as follows:
3. Use the array_pad () function to insert new elements into the array
The array_pad ($array,$size,$value) function inserts a key value of $value into the array $array, thus filling the array to a specified length of $size. The $size parameter can be understood as the final number of elements in the array, that is, the length of the array after the insert operation.
The output is as follows:
4. Use the array_splice () function to insert new elements into the array
The array_splice ($array,$start,$length,$value) function is a powerful function that can be used to delete array elements, replace array elements, or insert array elements (just set the parameter $length to 0).
When $length=0, the parameter $start specifies where to start the insertion (subscript), and the parameter $value specifies the insertion value (if it is multiple values, it needs to be set to an array).
The output is as follows:
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