How to convert object to index array in php

Implementation steps: 1. Use the get_object_vars() function to convert the object into an associative array. The syntax "get_object_vars($object)" will return an associative array composed of object attributes; 2. Use the array_values() function Convert associative array to index array, syntax "array_values($array)".

The operating environment of this tutorial: windows7 system, PHP version 8.1, DELL G3 computer

In PHP, you can use the get_object_vars() function and array_values() function to convert objects into indexed arrays.

Implementation steps:

Step 1: Use the get_object_vars() function to convert the object into an associative array

The function in php to convert objects into arrays is "get_object_vars()".

get_object_vars() function is used to get the attributes of a given object and returns an associative array composed of object attributes. But if the object has no attributes, NULL is returned.

Syntax:

get_object_vars($object)

Returns an associative array composed of properties defined in the object specified by obj.

Note:

In versions prior to PHP 4.2.0, if variables declared in the obj object instance are not assigned a value, they will not be in the returned array . After PHP 4.2.0, these variables will be assigned null values ​​as key names.

Example:

<?php
class gfg {
    public  $geeks = 0.02;
    public $for = 1;
    public $Geeks = "php";
    public  $GEEKS;
    public  $e;
}
 
$example = new gfg;
$arr=get_object_vars($example);
var_dump($arr);
?>

As you can see, the get_object_vars() function will convert the object into an associative array.

Step 2: Use the array_values() function to convert the associative array into an index array

array_values() function can obtain the values ​​of all elements in the array and return the values ​​contained in the array Array of all values. (The returned array will use numeric keys, starting from 0 and increasing by 1.)

The syntax format of this function is as follows:

array_values($array)

• The parameter array is The array being manipulated.

array_values() function is to return the values ​​of all elements in the array. It is very simple to use. With only one required parameter, you can return an array containing all the values ​​in the given array. Array, but does not retain key names. The returned array will be in the form of an indexed array, with array indices starting at 0 and increasing by 1.

Example: Convert the associative array obtained in step 1 to an index array

array_values($arr)

Note: array_values() function only applies to One-dimensional arrays have no effect on dimensions other than the first dimension in multi-dimensional arrays.

But you can get the value by accessing the array in the multidimensional array:

<?php
header("Content-type:text/html;charset=utf-8");
$arr = array(1,2,3,"aa"=>array(4,5,6),7,8,array(9,10)); 
echo "原关联数组：";
var_dump($arr);
$res=array_values($arr["aa"]);
echo "转换后的数组：";
var_dump($res);
?>

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