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PHP Cookbook读书笔记 – 第09章表单

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Release: 2016-06-06 19:40:48
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本章的内容可以说是上一章节的延续,因为表单也是web的基础,但同时也是web基础中的重要组成部分。本章重点介绍了表单中可能出现的各项表单元素的验证、文件上传以及相关的安全问题。 $_SERVER['REQUEST_METHOD']:检测请求是GET还是POST 验证email地址是否

PHP Cookbook读书笔记 – 第09章表单本章的内容可以说是上一章节的延续,因为表单也是web的基础,但同时也是web基础中的重要组成部分。本章重点介绍了表单中可能出现的各项表单元素的验证、文件上传以及相关的安全问题。

$_SERVER['REQUEST_METHOD']:检测请求是GET还是POST

验证email地址是否有效的函数:

 
function is_valid_email_address($email){ 
        $qtext = '[^\\x0d\\x22\\x5c\\x80-\\xff]'; 
        $dtext = '[^\\x0d\\x5b-\\x5d\\x80-\\xff]'; 
        $atom = '[^\\x00-\\x20\\x22\\x28\\x29\\x2c\\x2e\\x3a-\\x3c'. 
            '\\x3e\\x40\\x5b-\\x5d\\x7f-\\xff]+'; 
        $quoted_pair = '\\x5c[\\x00-\\x7f]'; 
        $domain_literal = "\\x5b($dtext|$quoted_pair)*\\x5d"; 
        $quoted_string = "\\x22($qtext|$quoted_pair)*\\x22"; 
        $domain_ref = $atom; 
        $sub_domain = "($domain_ref|$domain_literal)"; 
        $word = "($atom|$quoted_string)"; 
        $domain = "$sub_domain(\\x2e$sub_domain)*"; 
        $local_part = "$word(\\x2e$word)*"; 
        $addr_spec = "$local_part\\x40$domain"; 
        return preg_match("!^$addr_spec$!", $email) ? 1 : 0; 
} 

if (is_valid_email_address('cal@example.com')) { 
   print 'cal@example.com is a valid e-mail address'; 
} else { 
   print 'cal@example.com is not a valid e-mail address'; 
}
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PHP中的超级变量

$_SERVER:服务器和运行环境的相关信息

$_GET:HTTP的GET请求变量

$_POST:POST变量,对于多选的Checkbox是一个数组

$_FILES:文件上传变量

$_REQUEST:一个数组,包含了GET、POST、COOKIE

$_SESSION:Session变量

$_ENV:环境变量

$_COOKIE:cookie变量

htmlentities() 与 htmlspecialchars()的区别:htmlspecialchars只转化(&’”)这5个字符,而

htmlentities将会转换所有内容

PHP多选的处理代码

 The Bronx
 Brooklyn
 Manhattan
 Queens
 Staten Island

<?php print 'I love ' . join(' and ', $_POST['boroughs']) . '!';
?>
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