Basic structure of PHP functions

PHP Functionsis particularly common, convenient for multiple reuse and maintenance, so be sure to understand PHP FunctionsThe basic structure of what kind of, mastered the PHP FunctionsBasic structure It's a lot easier to understand what's deep.

Structure of PHP functions

Building a function

function get_sum ($a, $b) {  $c = $a + $b;   return $c; } $sum = Get_sum (3,5)//call echo $sum; Output

The basic structure of the build function

• Keyword: function

• Function Name: get_sum

• Parameters: ($a, $b)

• Function Body: {$c = $a + $b}

• Return value: Return $c

function naming rules:

Valid functions must begin with a letter or underscore, followed by letters, numbers, and underscores.

The return value of the function:

Defined

• Value is returned by a return statement

• can return any type

• The return statement immediately terminates the function and gives control to the line of code that called the function

function is an essential knowledge point in PHP and must be mastered

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