学php必收藏的几个经典代码第1/2页

for($counter=1;$counter<=6;$counter++)//循环6次
{
print("counteris$counter
n");//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？n");
print("

n");
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)."n");
   }

   print("

函数的简单调用:

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



有返回值的函数






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

有默认参数的函数






functionprintColored($Text,$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("

n");
printColored("这是蓝颜色的字！","blue");//调用function函数
print("
n");
?>

用的规算法判断是否是整数

functioncheckInteger($Number)
{
if($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("0是整数吗？".
checkInteger(0)."
n");
print("7是整数吗？".
checkInteger(7)."
n");
print("3.5呢？".checkInteger(3.5)."
n");
print("那么-5呢？".checkInteger(-5)."
n");
print("还有-9.2？".checkInteger(-9.2)."
n");
?>


初始化数组

$monthName=array(1=>"January","February","March",//初始化一个数组
"April","May","June","July","August",
"September","October","November","December");
print("英语的“5月”是$monthName[5]。
n");//打印数组中的第6个元素
?>



获取数组中的元素




$monthName=array(
/*定义$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$monthName["Dec"]*/
"January"=>"January","February"=>"February",
"March"=>"March","April"=>"April",
"May"=>"May","June"=>"June",
"July"=>"July","August"=>"August",
"September"=>"September","October"=>"October",
"November"=>"November","December"=>"December"
);
/*打印相关的元素*/
print("Month5is".$monthName[5]."
n");
print("MonthAugis".$monthName["Aug"]."
n");
print("MonthJuneis".$monthName["June"]."
n");
?>


创建一个多维数组




$Cities=array(//二维数组array（）
"华北地区"=>array(
"北京市",
"天津市",
"石家庄"
),
"西北地区"=>array(
"西安",
"拉萨"
)
);
print("华北地区:".$Cities["华北地区"][0]);//打印$Cities["华北地区"][0]
?>


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