Several essential pieces of code that beginners should master when learning PHP development_PHP Tutorial

经典循环例子

    for($counter = 1; $counter     {
        print("counter is $counter
");    //打印6次
    }   
?>

for的高级运用

    /*
    ** 打印必要的说明文字
    */
    print("距离星期一还有几天？ ");
    print("

");
    for($currentDate = date("U");             //定义$currentDate时间格式
        date("l", $currentDate) != "Monday";     //判断是不是当前系统时间是Monday
        $currentDate += (60 * 60 * 24))        //当前时间加上1天
    {
        /*
        ** 打印时间名称
        */
        print("
1. " . date("l", $currentDate) . " ");
       }

       print("

");
?>

函数的简单调用:

    function printBold($inputText)            //定义function printBold（）
    {
        print("" . $inputText . "");    ////打印$inputText
    }
    print("这行没有加重！
");            //直接打印字符串
    printBold("这行加重了！！！");            //调用function printBold()函数
    print("
");
    print("这行没有加重！
");            //直接打印字符串
?>



有返回值的函数







    function makeBold($inputText)        //定义function makeBold()函数
    {
        $boldedText = "";
        $boldedText .= $inputText;
        $boldedText .= "";
        return($boldedText);        //返回变量$boldedText
    }
    print("这行没有加重！！！
");    //直接打印字符串   
    print(makeBold("这行被加重了！！！") . "
");//调用function makeBold()函数
    print("这行没有加重！！！
");    //直接打印字符串
?>

Function with default parameters

function printColored($Text, $Color="black") //Define function function
{
print( "$Text"); //Get the content and color of the string
}
printColored("This is a black word!"); //Call function
print("

");
printColored("This is a blue word!", "blue"); //Call function
print("
");
?>

Use the rule algorithm to determine whether it is an integer

function checkInteger($Number)
{
if($Number > 1)
{
/* An integer minus 1 is still an integer*/
return(checkInteger($ Number- 1));
}
elseif($Number {
return(checkInteger((-1)*$Number-1));//Take the absolute value and analyze negative numbers as integers
                                                                                                                                                                  ) AND ($Number                                                                                                                                                                                                                        /* 0 and 1 are integers                                                                                         🎜>                                                                                                                                                                                             ; Is 0 an integer? " .
                                                                                                                                                                                                                                       checkInteger(0)                                     ");
print("Is 7 an integer? " .
checkInteger(7) . "
");
print("What about 3.5?" . checkInteger(3.5) . "
");
print("What about -5?" . checkInteger(-5) . "
");
print("And -9.2?" . checkInteger(-9.2) . "
");
?>


Initialization array






< ;?
$monthName = array(1=>"January", "February", "March",//Initialize an array
"April", "May", "June", "July", "August",
"September", "October", "November", "D

http://www.bkjia.com/PHPjc/486620.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/486620.htmlTechArticleClassic loop example HTML HEAD TITLE Classic loop example/TITLE /HEAD BODY ? for($counter = 1; $counter = 6; $counter++) //Loop 6 times { print("Bcounter is $counter/BBR"); //Print 6 times}...