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linux - php - 快速入门 hello world页面

发布时间: 2023-01-15 00:15:00

refer to:
https://www.php.net/manual/en/tutorial.firstpage.php

apache + php的安装方式的默认解析目录：

/var/www/html

创建一个新的页面:

hi.php

<html>
  <body>
    <?php echo '<p>hihihi</p>'; ?>
    <?php echo '<p>hihihi2</p>'; ?>
    <?php echo '<p style="color: red">hihihi3</p>'; ?>
    <?php echo '<p style="font-size: 30px">hihihi4</p>'; ?>
    <?php echo '<p>hihihi5</p>'; ?>


    <h3>================= </h3>
    <?php phpinfo(); ?>
    <h3>=== print one var </h3>
    <?php
        echo $_SERVER['HTTP_USER_AGENT'];
    ?>
    <h3> if, function example </h3>
    <?php
        if(strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== FALSE){
          echo 'You are using IE ';
        }else{
          echo "You are not using IE, you are using firefox, chrome ... ";
        }
    ?>
    <h3> example 4</h3>
    <?php if(TRUE){ ?>
    <p>hihihi, I am true </p>
    <?php } else { ?>
    <p> i am false, you will never see me </p>
    <?php } ?>
  </body>
</html>

这样就可以看到输出了：

操作表单：

<form action="action.php" method="post">
 <p>Your name: <input type="text" name="name" /></p>
 <p>Your age: <input type="text" name="age" /></p>
 <p><input type="submit" /></p>
</form>

action.php

<body>
Hi , <br/>
name is: <?php echo htmlspecialchars($_POST['name']) ?> <br/>
age is: <?php echo (int)$_POST['age']; ?> <br/>
</body>

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