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
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'; }
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']) . '!'; ?>

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

Dreamweaver CS6
Visual web development tools

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft

WebStorm Mac version
Useful JavaScript development tools
