Detailed explanation of php static static variable tutorial

? & Lt;? Php

 $ w3sky ++;
}
? & Gt; The value of $w3sky will be set to 0 and "0" will be output.
Increasing the variable $w3sky++ by one has no effect, because the variable $w3sky does not exist once this function exits.

Example, to implement a counting function that will not lose this count value, to define the variable $w3sky as static, use PHP static variables. Simple example of php static variables

static $w3sky = 0;

echo $w3sky;

$w3sky++;

}

?>

This function works every time Calling Test() will output the value of $w3sky and add one. 
Static variables also provide a way to handle recursive functions. A recursive function is a method that calls itself.
Be careful when writing recursive functions, as they may recurse indefinitely without an exit. Be sure to have a way to abort the recursion. Here is a simple function that recursively counts to 10, using the static variable $count to determine when to stop:

2. Examples of static variables and recursive functions:

static $count = 0;

$count++;

echo $count;

if ($count < 10) {

Test();

?>


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Note: Static variables can be declared as shown in the above example.
Assigning it with the result of an expression in a declaration will result in a parsing error. 
3. Example of declaring static variables:





function foo(){

$int++;

echo $int;

}

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