What does => mean in php array

In php array => represents the connector between the array key name and the element. Simply put, the => symbol is used to separate keys and values. The left side represents the key and the right side represents the value.

The operating environment of this tutorial: Windows 10 system, PHP8.1.3 version, Dell G3 computer.

=> in php is generally used as a connector between array keys and elements. Simply put, the => symbol is used to separate keys and values. The left side represents the key and the right side represents the value.

For example:

$arr = array(
'a'=>'123',
'b'=>'456'
);
foreach($arr as $key=>$val){
//$key是数组键名
//$val是数组键名对应的值
}

Commonly used array operators

: Merge arrays. If the key names are the same, only the keys of the left array will be displayed. Value pair;

==: Compare the key name of the array and the corresponding key value. If they are the same, return true, otherwise return false;

===: Compare the key name and the corresponding key value. Whether the key values ​​and key value types are the same, and the order must be the same;

!=: Compare the key names of the array and the corresponding key values ​​​​are different;

!==: Compare the array key names Whether the key name and the corresponding key value and key value type are different, or the order is different;

<>: The effect is the same as !=

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