PHP编程基本语法快速入门手册

(编辑：jimmy 日期: 2024/10/1 浏览：2)
php脚本的后面名为.php，代码放置在下面的括号里面：
<"htmlcode">

<"hallo world";
"htmlcode">

<"htmlcode">

<!DOCTYPE html>
<html>
<body>

<"Hello World!<br>";
echo "Hello World!<br>";
EcHo "Hello World!<br>";
"htmlcode">

<"red";
$Color="black";
echo "my car is " . $color . "<br>";
echo "my car is " . $Color . "<br>";
"htmlcode">

<"<p>测试函数内部的变量：</p>";
 echo "变量 x 是：$x";
 echo "<br>";
 echo "变量 y 是：$y";
} 

myTest();

echo "<p>测试函数之外的变量：</p>";
echo "变量 x 是：$x";
echo "<br>";
echo "变量 y 是：$y";
"htmlcode">

<"htmlcode">

<"htmlcode">

<"htmlcode">

<"Hello world!","world");
"htmlcode">

<"GREETING", "Welcome to W3School.com.cn!");
echo GREETING;
"htmlcode">

<"H");

if ($t<"10") {
 echo "Have a good morning!";
} elseif ($t<"20") {
 echo "Have a good day!";
} else {
 echo "Have a good night!";
}
"htmlcode">

<"Number 1";
 break;
case 2:
 echo "Number 2";
 break;
case 3:
 echo "Number 3";
 break;
default:
 echo "No number between 1 and 3";
}
"htmlcode">

<"red","green","blue","yellow"); 

foreach ($colors as $value) {
 echo "$value <br>";
}
"function" 开头：
function functionName() {

  被执行的代码;

}

举个例子：


<"Hello world!";
}

writeMsg(); // 调用函数
"$fname Zhang. Born in $year <br>";
}

familyName("Li","1975");
familyName("Hong","1978");
familyName("Tao","1983");
"The height is : $minheight <br>";
}

setHeight(350);
setHeight(); // 将使用默认值 50
setHeight(135);
setHeight(80);
"5 + 10 = " . sum(5,10) . "<br>";
echo "7 + 13 = " . sum(7,13) . "<br>";
echo "2 + 4 = " . sum(2,4);
"htmlcode">

$cars=array("Volvo","BMW","SAAB");
<"Volvo","BMW","SAAB");
echo "I like " . $cars[0] . ", " . $cars[1] . " and " . $cars[2] . ".";
"Volvo","BMW","SAAB");
echo count($cars);
"Volvo","BMW","SAAB");
$arrlength=count($cars);

for($x=0;$x<$arrlength;$x++) {
 echo $cars[$x];
 echo "<br>";
}
"htmlcode">

$age=array("Peter"=>"35","Ben"=>"37","Joe"=>"43");



或


$age['Peter']="35";
$age['Ben']="37";
$age['Joe']="43";

<"Bill"=>"35","Steve"=>"37","Peter"=>"43");
echo "Peter is " . $age['Peter'] . " years old.";
"Bill"=>"35","Steve"=>"37","Peter"=>"43");

foreach($age as $x=>$x_value) {
 echo "Key=" . $x . ", Value=" . $x_value;
 echo "<br>";
}
"htmlcode">

<"Bill"=>"35","Steve"=>"37","Peter"=>"43");
asort($age);
"Bill"=>"35","Steve"=>"37","Peter"=>"43");
ksort($age);
"post" 的 HTML 表单后的表单数据。也常用于传递变量。
  $_GET:$_GET 也可用于收集提交 HTML 表单 (method="get") 之后的表单数据。
  $_FILES
  $_ENV
  $_COOKIE
  $_SESSION

其他内容可以在表单处理中找到。

        
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