Mobile App Interface Programming technology-learning to implement PHP advanced functions

• function definition and invocation method

PHP函数的定义方式：    1.使用关键字“function”开始2.函数名可以是字母或下划线开头：functionname()3.在大括号中编写函数体：    functionname(){        //函数体        echo 'Eric';    }    调用方法为函数名+参数，例如：name();

• function that returns a value

  Use the return keyword to return a value to a function that returns any type that includes an array and an object, or NULL if the return is omitted.

    
     functionsum($a, $b) {return$a+$b;}//在这里调用函数取得返回值/** * 初始化数组函数 */functioninitArray(){$arr = array('o'=>'哦');    return$arr;}$s = sum(1,2);print_r($s.'
');$arr = initArray();print_r($arr['o']);?>

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