PHP入門需要掌握的幾種功能代碼
導語：PHP入門需要掌握的知識點還是挺多的，如果你想學php，那么，下面跟著百分網小編學一下一下的一些基本PHP功能，希望對你有所幫助。
經典循環例子
<HTML>
<HEAD>
<TITLE>經典循環例子</TITLE>
</HEAD>
<BODY>
<?
for($counter = 1; $counter <= 6; $counter++) /pic/p>
{
print("<B>counter is $counter</B><BR>n"); /pic/p>
}
?>
</BODY>
</HTML>
for的高級運用
<HTML>
<HEAD>
<TITLE>for的高級運用</TITLE>
</HEAD>
<BODY>
<?
/*
** 打印必要的說明文字
*/
print("<B>距離星期一還有幾天？</B>n");
print("<OL>n");
for($currentDate = date("U"); /pic/p>
date("l", $currentDate) != "Monday"; /pic/p>
$currentDate += (60 * 60 * 24)) /pic/p>
{
/*
** 打印時間名稱
*/
print("<LI>" . date("l", $currentDate) . "n");
}
print("</OL>n");
?>
</BODY>
</HTML>
函數的簡單調用:
<HTML>
<HEAD>
<TITLE>簡單的函數</TITLE>
</HEAD>
<BODY>
<FONT SIZE=5>
<?
function printBold($inputText) /pic/p>
{
print("<B>" . $inputText . "</B>"); /pic/pic/p>
}
print("這行沒有加重！<BR>n"); /pic/p>
printBold("這行加重了！！！"); /pic/p>
print("<BR>n");
print("這行沒有加重！<BR>n"); /pic/p>
?>
</FONT>
</BODY>
</HTML>
有返回值的函數
<HTML>
<HEAD>
<TITLE>有返回值的函數</TITLE>
</HEAD>
<BODY>
<FONT SIZE=5>
<?
function makeBold($inputText) /pic/p>
{
$boldedText = "<B>";
$boldedText .= $inputText;
$boldedText .= "</B>";
return($boldedText); /pic/p>
}
print("這行沒有加重！！！<BR>n"); /pic/p>
print(makeBold("這行被加重了！！！") . "<BR>n");/pic/p>
print("這行沒有加重！！！<BR>n"); /pic/p>
?>
</SIZE>
</BODY>
</HTML>
有默認參數的函數
<HTML>
<HEAD>
<TITLE>有默認參數的函數</TITLE>
</HEAD>
<BODY>
<FONT SIZE=5>
<?
function printColored($Text, $Color="black") /pic/p>
{
print("<FONT COLOR="$Color">$Text</FONT>"); /pic/p>
}
printColored("這是黑顏色的字！"); /pic/p>
print("<BR><BR>n");
printColored("這是藍顏色的字！", "blue"); /pic/p>
print("<BR>n");
?>
</SIZE>
</BODY>
</HTML>
用遞規算法判斷是否是整數
<HTML>
<HEAD>
<TITLE>判斷整數</TITLE>
</HEAD>
<BODY>
<?
function checkInteger($Number)
{
if($Number > 1)
{
/* 整數減1仍然是整數 */
return(checkInteger($Number-1));
}
elseif($Number < 0)
{
/* 對于一個負數，*/
/* 可以分析它的絕對值*/
return(checkInteger((-1)*$Number-1));/pic/p>
}
else
{
if(($Number > 0) AND ($Number < 1))
{
return("當然不是");
}
else
{
/* 0 和 1 是整數 */
/* 根據相關數學定義 */
return("是的");
}
}
}
print("<B>0是整數嗎？</B>" .
checkInteger(0) . "<BR>n");
print("<B>7是整數嗎？</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>還有-9.2？</B>" . checkInteger(-9.2) . "<BR>n");
?>
</BODY>
</HTML>
初始化數組
<HTML>
<HEAD>
<TITLE>初始化數組</TITLE>
</HEAD>
<FONT SIZE=5>
<?
$monthName = array(1=>"January", "February", "March",/pic/p>
"April", "May", "June", "July", "August",
"September", "October", "November", "December");
print(" 英語的“5月”是<B> $monthName[5] </B>。<BR>n");/pic/p>
?>
</FONT>
</BODY>
</HTML>
獲取數組中的元素
<HTML>
<HEAD>
<TITLE>獲取數組中的元素</TITLE>
</HEAD>
<?
$monthName = array(
/*定義$monthName[1]到$monthName[12]*/
1=>"January", "February", "March",
"April", "May", "June",
"July", "August", "September",
"October", "November", "December",
/*定義$monthName["Jan"]到$monthName["Dec"]*/
"Jan"=>"January", "Feb"=>"February",
"Mar"=>"March", "Apr"=>"April",
"May"=>"May", "Jun"=>"June",
"Jul"=>"July", "Aug"=>"August",
"Sep"=>"September", "Oct"=>"October",
"Nov"=>"November", "Dec"=>"December",
/*定義$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"
);
/*打印相關的元素*/
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");
?>
</BODY>
</HTML>
創建一個多維數組
<HTML>
<HEAD>
<TITLE>創建一個多維數組</TITLE>
</HEAD>
<?
$Cities = array( /pic/p>
"華北地區"=>array(
"北京市",
"天津市",
"石家莊"
),
"西北地區"=>array(
"西安",
"拉薩"
)
);
print("華北地區: ".$Cities["華北地區"][0]); /pic/p>
?>
</BODY>
</HTML>
PHP 4.0實現表格狀打印
<HTML>
<HEAD>
<TITLE>實現表格狀打印</TITLE>
</HEAD>
<BODY>
<?
/*
** 數據表格化
*/
print("<TABLE bgcolor=’ffccoo’ BORDER="1">n"); /pic/p>
for($Row=1; $Row <= 12; $Row ++)
{
print("<TR>n"); /pic/p>
/pic/p>
for($Column=1; $Column <= 12; $Column ++)
{
print("<TD>");/pic/p>
print($Row * $Column);/pic/p>
print("</TD>");
}
print("</TR>n"); /pic/p>
}
print("</TABLE>n"); /pic/p>
?>
</BODY>
</HTML>
查看系統的一些變量
<HTML>
<HEAD>
<TITLE>查看PHP的環境變量</TITLE>
</HEAD>
<BODY>
<?
print("你正在用文件的名字為： ");
print(__FILE__);
print(" <BR>n");
print("<hr>");
print("你的操作系統為： ");
print(PHP_OS);
print("<hr>");
print("你的php的版本為： ");
print(PHP_VERSION)
?>
</BODY>
</HTML>
打開本地或者遠程文件
<HTML>
<HEAD>
<TITLE>打開本地或者遠程文件</TITLE>
</HEAD>
<BODY>
<?
print("<H3>通過http協議打開文件</H3>n");
/pic/p>
if(!($myFile = fopen("d:web/web/php/test/data.txt", "r")))
{
print("文件不能打開");
exit;
}
while(!feof($myFile)) /pic/p>
{
/pic/p>
$myLine = fgetss($myFile, 255);
print("$myLine <BR>n");
}
/pic/p>
fclose($myFile);
?>
</BODY>
</HTML>
打開文件的幾種方式比較
<HTML>
<HEAD>
<TITLE>讀取文件內容</TITLE>
</HEAD>
<BODY>
<?
/pic/p>
if($myFile = fopen("data.txt", "r"))
{
while(!feof($myFile))
{
$myCharacter = fgetc($myFile);
print($myCharacter);
}
fclose($myFile);
}
?>
<? print("<hr>");?>
<?
/pic/p>
if($myFile = fopen("data.txt", "r"))
{
while(!feof($myFile))
{
$myLine = fgets($myFile, 255);
print($myLine);
}
fclose($myFile);
}
?>
<? print("<hr>");?>
<?
/* 打開文件同時打印文件的每一行,
同時去掉取回字符串中的 HTML 語言
*/
if($myFile = fopen("data.txt", "r"))
{
while(!feof($myFile))
{
$myLine = fgetss($myFile, 255);
print($myLine);
}
fclose($myFile);
}
?>
</BODY>
</HTML>
訪問文件常見屬性
<HTML>
<HEAD>
<TITLE>訪問文件常見屬性</TITLE>
</HEAD>
<BODY>
<BR>
<?
print("文件的所有者（UID 值）：");
print(fileowner("data.txt")."<br>");
print("文件的大小：");
print(filesize("data.txt")."<br>");
print("文件的類型：");
print(filetype("data.txt")."<br>");
?>
</BODY>
</HTML>
調用文本文件內容
<HTML>
<HEAD>
<TITLE>調用文本文件內容</TITLE>
</HEAD>
<BODY>
<CENTER>
<?
/pic/p>
$myFile = file( "data.txt");
for($index = 0; $index < count($myFile); $index++)
{
print($myFile[$index]."<BR>");
}
?>
</CENTER>
</BODY>
</HTML>
創建目錄函數
<HTML>
<HEAD>
<TITLE>創建目錄函數</TITLE>
</HEAD>
<BODY>
<?
if(mkdir("myDir1", 0777)) /pic/p>
{
print("目錄創建成功"); /pic/p>
}
else
{
print("目錄建立失敗!"); /pic/p>
}
?>
</BODY>
</HTML>
瀏覽目錄
<HTML>
<HEAD>
<TITLE>瀏覽目錄</TITLE>
</HEAD>
<BODY>
<?
/pic/p>
print("<TABLE BORDER="1">n");
/pic/p>
print("<TR><font color=’red’>n");
print("<TH>文件名</TH>n");
print("<TH>文件的大小</TH>n");
print("</font></TR>n");
$myDirectory = opendir("."); /pic/p>
/pic/p>
while($entryName = readdir($myDirectory))
{
print("<TR>");
print("<TD>$entryName</TD>");
print("<TD ALIGN="right">");
print(filesize($entryName));
print("</TD>");
print("</TR>n");
}
closedir($myDirectory); /pic/p>
print("</TABLE>n");
?>
</BODY>
</HTML>
PHP相關信息
<HTML>
<HEAD>
<TITLE>PHP相關信息</TITLE>
</HEAD>
<BODY>
<?
phpinfo();
?>
</BODY>
</HTML>
常用的數值判斷函數
<HTML>
<HEAD>
<TITLE>常用的數值判斷函數</TITLE>
</HEAD>
<BODY>
<?
/pic/p>
$colors = array("red", "blue", "green");
if(is_array($colors))
{
print("colors is an array"."<br>");
}
/pic/p>
$Temperature = 15.23;
if(is_double($Temperature))
{
print("Temperature is a double"."<br>");
}
/pic/p>
$PageCount = 2234;
if(is_integer($PageCount))
{
print("$PageCount is an integer"."<br>");
}
/pic/p>
class widget
{
var $name;
var $length;
}
$thing = new widget;
if(is_object($thing))
{
print("thing is an object"."<br>");
}
/pic/p>
$Greeting = "Hello";
if(is_string($Greeting))
{
print("Greeting is a string"."<br>");
}
?>
</BODY>
</HTML>
文件上傳界面
<HTML>
<HEAD>
<TITLE>文件上傳界面</TITLE>
</HEAD>
<BODY><TABLE><CENTER>
<?
if($UploadAction){
$UploadAction=0;
$TimeLimit=60;
/*設置超時限制時間默認時間為 30s，設置為0時為不限時 */
set_time_limit($TimeLimit);
If(($Upfile != "none")&&
($Upfile != ""))
{
$Filepath="d:webwebphptest"; /pic/p>
$FileName=$Filepath.$Upfile_name;
if($Upfile_size <1024) /pic/p>
{$FileSize = (string)$Upfile_size . "字節";}
elseif($Upfile_size <(1024 * 1024))
{
$FileSize = number_format((double)($Upfile_size / 1024), 1) . " KB";
}
else
{
$FileSize = number_format((double)($Upfile_size/(1024*1024)),1)."MB";
}
if(!file_exists($FileName))
{
if(copy($Upfile,$FileName))
{unlink($Upfile);
echo "<br><br>n";
echo "文件 $Upfile_name 已上載成功！";
echo "<br><br>n";
echo "文件位置：$FileName";
echo "<br><br>n";
echo "文件大小：$FileSize";
echo "<br><br>n";
}
else
{echo "文件 $Upfile_name上載失敗！"; }
}
else
{echo "文件 $Upfile_name已經存在！"; }
}
else
{echo "你沒有選擇任何文件上載！"; }
set_time_limit(30); /pic/p>
}
?>
<FORM ENCTYPE = "multipart/form-data" NAME = "SubmitForm"
ACTION = "default.php" METHOD = "POST">
<INPUT TYPE = "hidden" NAME = "MAX_FILE_SIZE" VALUE ="1000000">
<INPUT TYPE = "hidden" NAME = "UploadAction" VALUE = "1">
<TR><TD><INPUT NAME = "Upfile" TYPE = "file" SIZE = "30"></TD>
</TR><TR><TD><INPUT NAME = "submit" VALUE = "提交" TYPE = "submit">
<INPUT NAME = "reset" VALUE = "重置" TYPE = "reset"></TD>
</TR></FORM></CENTER></TABLE>
</BODY>
</HTML>
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