PHP tutorial(Function)

The syntax of function is very similar to Javascript:

 function abc() {
     echo "I love PHP";
 }

 echo "Hello, World 
";
 abc();
?>

The output is:

Hello, World
I love PHP

You can put any PHP code into the function block. But you should keep in mind, to use a function, you must call functin name with "()". In the above the sample, we call the function:

abc();

We can pass parameters to a function:

function abc($count, $msg = "I love PHP") {
for($i = 0; $i < $count; $i++){
echo $msg . "
";
}
}

abc(5);

The output is that the value of $msg "I love PHP" will be displayed for 5 times.

We can use the return statements to assign a variable's value based on the results of the execution of a particular function. For example:

 function compareNum($v1, $v2) {
  if($v1 > $v2) {
   return "Yes";
  } else {
   return "No";
  }
 ?>

 $anwser = compareNum(8, 10);
 echo "Is 8 greater than 10? -- $answer!";
?>

The output will be:

Is 8 greater than 10? -- No!