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In this article, the editor introduces in detail "php how to add data to the array", the content is detailed, the steps are clear, and the details are handled properly. I hope this article "php how to add data to the array" can help you solve your doubts.

Php's method of adding data to an array: 1. Use "array_unshift (array, value 1, value 2.)" Statement; 2. Use "array_push (array, value 1, value 2.)" Statement; 3. Use the "array_splice (array, start position, 0, value)" statement.

Operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

Php adds data to the array

Method 1:array_unshift () function

Array_unshift ($array,$value1,$value2...) Function can insert one or more new elements (key values) at the beginning of the array.

Method 2:array_push () function

Array_push ($array,$value1,$value2...) Function can insert one or more elements (key values) at the end of the array.

Method 3:array_splice () function

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).

Method 4:array_pad () function

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.

As you can see from array_pad ($arr,5,1), if the value of $size is 5, there are five elements in the array after the insert operation, while there are already three elements, so you only need to insert two elements. And because the insert value $value is 1, you only need to insert two elements with a value of "1". So the output is:

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