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);
?>
Recommended learning: "PHP Video Tutorial"
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