Detailed explanation of php static variables_php static variables and global static variables examples

function test()
{
 static $var = 5; //static $var = 1+1; will report an error
 $var++;
 echo $var . ' ';
}

test() ; //2
test(); //3
test(); //4
echo $var; //Error: Notice: Undefined variable: var

Part 2, php static variables Global type, let’s understand it through examples.

//Global variables themselves are static storage methods, and all global variables are static variables
function static_global(){
 global $glo;
 $glo++;
 echo $glo.' ';
}
static_global(); //1
static_global(); //2
static_global(); //3
echo $glo . '

Tips: Static global variables are not used much.