初学者学习PHP开发应该掌握的几段精华代码
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("
-
");
- " . date("l", $currentDate) . "
");
}print("
for($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
$currentDate += (60 * 60 * 24)) //当前时间加上1天
{
/*
** 打印时间名称
*/
print("
?>
函数的简单调用:
function printBold($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$boldedText
}
print("这行没有加重!!!
"); //直接打印字符串
print(makeBold("这行被加重了!!!") . "
");//调用function makeBold()函数
print("这行没有加重!!!
"); //直接打印字符串
?>
有默认参数的函数
function printColored($Text, $Color="black") //定义function函数
{
print("$Text"); //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("
");
printColored("这是蓝颜色的字!", "blue"); //调用function函数
print("
");
?>
用的规算法判断是否是整数
function checkInteger($Number)
{
if($Number > 1)
{
/* 整数减1仍然是整数 */
return(checkInteger($Number-1));
}
elseif($Number {
/* 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 {
return("当然不是");
}
else
{
/* 0 和 1 是整数 */
/* 根据相关数学定义 */
return("是的");
}
}
}
print("0是整数吗?" .
checkInteger(0) . "
");
print("7是整数吗? " .
checkInteger(7) . "
");
print("3.5呢?" . checkInteger(3.5) . "
");
print("那么-5呢?" . checkInteger(-5) . "
");
print("还有-9.2?" . checkInteger(-9.2) . "
");
?>
初始化数组
$monthName = array(1=>"January", "February", "March",//初始化一个数组
"April", "May", "June", "July", "August",
"September", "October", "November", "D

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