PHP Variable
Variable can be access by dynamic variable name and variable can store another variable
You can make variable in PHP by $ ( dollar) sign
Example
output
simple php coder
another example of php code for beginer
Example
output
17
Tips : Variable name letter , character , _variableName
Tips : PHP variable are case sensitive $int and $INT both are different variable
PHP Variable
1 - global variable
2 - local variable
3 - static variable
Global (global) -Which variable decelare outside the function is global variable
NOTE : Generally you can not access global variable inside the function
Tips : If you want to access global variable inside the function then you should use global keyword before variable
Example
PHP global variable
<?php
$x = 5; // This is global variable
$y = 8; //This is also global variable
echo $x ; // no error
function myFunction(){
echo $x;
}
myFunction(); // it generate error becuase $x is global variable
?>
Use global variable inside the function
<?php
$x =5;
$y = 8;
function myFunction(){
global $x;
echo $x;
}
myFunction();
?>
J
local variable - Which variable declared inside the function is local variable and the scope of local variable is inside the function
Tips : If you want to access local variable outside the function you need to return keyword
Example
local variable example
<?php
function myFunction(){
$x = 12;
return $x;
}
$out = myFunction();
echo $out;
?>
J
static variable
When you want to not change variable value after increament then you can use static variable
Example
<?php
function myFunction(){
$a = 0;
echo $a;
$++;
}
// after first calling of function the value of $a = 1; deu to static variable;
myfunction();
echo "<br>";
myFunction();
echo "<br>";
myFunction();
?>
Result
0
1
2
