<?php
function say_hello_to($name)
{
echo "Hey {$name}! <br?>";
}
$name = "Me";
say_hello_to($name);
//arguments are scooped as local variable
function say_hello_with_title($name, $title = "Honorable")
{
echo " {$title} {$name}";
}
$name = "Caro";
$title = "Ms";
say_hello_with_title($name);
/*argument order must be maintained
prdefined arguments must appear last
*/
#coder
<pre>
<?php
# This function returns a multidimensional array containing a list of all defined variables,
# be them environment, server or user-defined variables, within the scope that get_defined_vars() is called.
# print_r(get_defined_vars()); // get_defined_vars — Returns an array of all defined variables
?>
</pre>
<br />
<?php
function say_hello_to($word)
{
echo "Hello {$word}!<br /> ";
var_dump(debug_backtrace());
// dumps info
}
say_hello_to('Everyone');
// Third party tools
// 1. Xdebug
// 2. DBG
// 3. FirePHP (firefox)
?>
</body>
</html>
<!--Define&Call Function-->
<?php
function say_hello()
{
echo "Hello_world!<br/>";
}
say_hello();
?>
<!--Function arguments-->
<?php
$name = "John Doe";
function say_hello_to($greeting, $target, $punct)
{
echo $greeting . " " . $target . $punct . "<br/>";
}
say_hello_to("Hello", $name, "!!");
?>
<!--Function return values-->
<?php
function add($var1 = 8, $var2 = 7)
{
$sum = $var1 + $var2;
return $sum;
}
$result1 = add(3, 4);
echo $result1 . "<br/>";
echo $result2 = add() . "<br/>";
?>
<!--Function multiple return values-->
<?php
function add_sub($val1, $val2)
<html lang="en">
<head>
<title>Functions: Defining</title>
</head>
<body>
<?php
function say_hello()
{
echo "Hello World!<br />";
}
say_hello();
function say_hello_to($word)
{
echo "Hello {$word}!<br />";
}
say_hello_to("World");
say_hello_to("Everyone");
say_hello_loudly();
function say_hello_loudly()
{
echo "HELLO WORLD!<br />";
}
// function say_hello_loudly() {
// echo "We can't redefine a function.";
// }
?>
</body>
</html>
<head>
<meta charset="UTF-8">
<title>Defining Functions</title>
</head>
<body>
<?php
// Function: A code that preforms a specific task ex: inarry
function say_hello()
{
echo "Hello World!<br />";
}
// Call function
// Must use ()
say_hello();
function say_hello_to($word)
{
echo "Hello {$word}!<br />";
}
say_hello_to("World");
say_hello_to("Friend");
function say_hello_caps()
{
echo "HELLO";
}
say_hello_caps();
// Cannot redefine a function
?>
</body>
</html>
$sum = $x + $y;
return $sum;
}
// using global variables in functions
function use_variable()
{
global $some_var;
echo $some_var;
}
greetings();
// calling a function
echo '<br/>';
echo '<br/>';
greetings_to('John Doe');
// calling function with args
echo '<br/>';
echo '<br/>';
say_hello_to('Jane Doe');
echo '<br/>';
echo '<br/>';
echo calculate_sum(15, 68);
echo '<br/>';
echo '<br/>';
echo calculate_sum();
echo '<br/>';
echo '<br/>';
echo use_variable();
?>
</body>
</html>
<?php
function say_hello()
{
//function without arguments
echo "Hey Full Sailors!<br />";
}
say_hello();
function say_hello_to($word)
{
//function with argument
echo "Hello {$word}!<br />";
}
say_hello_to("Class of 2015");
say_hello_to("SSL Developers");
?>
<br /><br />
<?php
say_hello_loudly();
//NOT A BEST PRACTICE
// However, this IS allowed because...
//PHP Pre-processes your file
function say_hello_loudly()
{
echo "HELLO PROGRAMMING WORLD!<br />";
}
//function say_hello_loudly() {
//echo "We CANNOT re-define a function.";
//} //Uses the same name as a funciton above == NOT ALLOWED
?>
