初学者学习PHP开发应该掌握几段精华代码(1)(2)

＜HTML＞
＜HEAD＞
＜TITLE＞有默认参数的函数＜/TITLE＞
＜/HEAD＞
＜BODY＞
＜FONT SIZE=5＞
＜?
    function printColored($Text, $Color="black")  //定义function函数
    {
        print("＜FONT COLOR=\"$Color\"＞$Text＜/FONT＞"); 

    //获取字符串的内容和颜色
    }
    printColored("这是黑颜色的字！");   //调用function函数
    print("＜BR＞＜BR＞\n");
    printColored("这是蓝颜色的字！", "blue");    //调用function函数
    print("＜BR＞\n");
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＜/SIZE＞
＜/BODY＞
＜/HTML＞

＜HTML＞
＜HEAD＞
＜TITLE＞判断整数＜/TITLE＞
＜/HEAD＞
＜BODY＞
＜?
    function checkInteger($Number)
    {
        if($Number ＞ 1)
        {
            /* 整数减1仍然是整数 */
            return(checkInteger($Number-1));
        }
        elseif($Number ＜ 0)
        {
            /* 对于一个负数，*/
            /* 可以分析它的绝对值*/
            return(checkInteger((-1)*$Number-1));//取绝对值，把负数按整数分析
        }
        else
        {
            if(($Number ＞ 0) AND ($Number ＜ 1))
            {
                return("当然不是");
            }
            else
            {
                /* 0 和 1 是整数       */
                /* 根据相关数学定义 */
                return("是的");
            }
        }
    }
    print("＜B＞0是整数吗？＜/B＞" . 
        checkInteger(0) . "＜BR＞\n");
    print("＜B＞7是整数吗？＜/B＞ " . 
        checkInteger(7) . "＜BR＞\n");
    print("＜B＞3.5呢？＜/B＞" . checkInteger(3.5) . "＜BR＞\n");
    print("＜B＞那么-5呢？＜/B＞" . checkInteger(-5) . "＜BR＞\n");
    print("＜B＞还有-9.2？＜/B＞" . checkInteger(-9.2) . "＜BR＞\n");
?＞
＜/BODY＞
＜/HTML＞

＜HTML＞
＜HEAD＞
＜TITLE＞初始化数组＜/TITLE＞
＜/HEAD＞
＜FONT SIZE=5＞
＜?
    $monthName = array(1=＞"January", "February", "March",//初始化一个数组
        "April", "May", "June", "July", "August",
        "September", "October", "November", "December");
    print(" 英语的“5月”是＜B＞ $monthName[5] ＜/B＞。＜BR＞\n");

  //打印数组中的第6个元素
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＜/FONT＞
＜/BODY＞
＜/HTML＞

＜HTML＞
＜HEAD＞
＜TITLE＞获取数组中的元素＜/TITLE＞
＜/HEAD＞
＜?
    $monthName = array(
    /*定义$monthName[1]到$monthName[12]*/
        1=＞"January", "February", "March",
        "April", "May", "June", 
        "July", "August", "September", 
        "October", "November", "December",
    /*定义$monthName["Jan"]到$monthName["Dec"]*/
        "Jan"=＞"January", "Feb"=＞"February",
        "Mar"=＞"March", "Apr"=＞"April", 
        "May"=＞"May", "Jun"=＞"June", 
        "Jul"=＞"July", "Aug"=＞"August",
        "Sep"=＞"September", "Oct"=＞"October", 
        "Nov"=＞"November", "Dec"=＞"December",
    /*定义$monthName["Jan"]到$monthName["Dec"]*/
        "January"=＞"January", "February"=＞"February",
        "March"=＞"March", "April"=＞"April", 
        "May"=＞"May", "June"=＞"June", 
        "July"=＞"July", "August"=＞"August",
        "September"=＞"September", "October"=＞"October", 
        "November"=＞"November", "December"=＞"December"
        );
    /*打印相关的元素*/
    print("Month ＜B＞5＜/B＞ is ＜B＞" . 

   $monthName[5]. "＜/B＞＜BR＞\n");
    print("Month ＜B＞Aug＜/B＞ is ＜B＞" . 

    $monthName["Aug"] . "＜/B＞＜BR＞\n");
    print("Month ＜B＞June＜/B＞ is ＜B＞" . 

      $monthName["June"] . "＜/B＞＜BR＞\n");
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＜/BODY＞
＜/HTML＞