以前用PHP验证邮箱、URL、IP是否合法都是通过自己写正则来实现,但是有时候脑子发昏,可能会写出一个不是完全正确的正则,导致验证出错,今天发现原来PHP本身自带了验证邮箱、URL、IP是否合法的函数。
主要使用的是filter_var函数。
语法
filter_var(variable,filter,options)
参数 描述
variable 必需。规定要过滤的变量。
filter 可选。规定要使用的过滤器的 ID。
options 规定包含标志/选项的数组。检查每个过滤器可能的标志和选项。
PHP Filters
ottom: 0px; text-transform: uppercase; font-weight: 500; color: rgb(102,102,102); outline-width: 0px; padding-bottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; letter-spacing: 0.1em; outline-color: invert; line-height: 2.6em; padding-right: 0px">ID 名称 | ottom: 0px; text-transform: uppercase; font-weight: 500; color: rgb(102,102); outline-width: 0px; padding-bottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; letter-spacing: 0.1em; outline-color: invert; line-height: 2.6em; padding-right: 0px">描述 | ottom-width: 0px; outline-width: 0px; padding-bottom: 6px; padding-top: 6px; outline-style: none; padding-left: 0px; margin: 0px; outline-color: invert; padding-right: 10px">ottom: 0px; color: rgb(144,11,9); outline-width: 0px; padding-bottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">FILTER_CALLBACK | ottom-width: 0px; outline-width: 0px; padding-bottom: 6px; padding-top: 6px; outline-style: none; padding-left: 0px; margin: 0px; outline-color: invert; padding-right: 10px">调用用户自定义函数来过滤数据。ottom: 0px; outline-width: 0px; padding-bottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">ottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">FILTER_SANITIZE_STRING | ottom-width: 0px; outline-width: 0px; padding-bottom: 6px; padding-top: 6px; outline-style: none; padding-left: 0px; margin: 0px; outline-color: invert; padding-right: 10px">去除标签,去除或编码特殊字符。ottom: 0px; outline-width: 0px; padding-bottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">ottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">FILTER_SANITIZE_STRIPPED | ottom-width: 0px; outline-width: 0px; padding-bottom: 6px; padding-top: 6px; outline-style: none; padding-left: 0px; margin: 0px; outline-color: invert; padding-right: 10px">“string” 过滤器的别名。ottom: 0px; outline-width: 0px; padding-bottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">ottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">FILTER_SANITIZE_ENCODED | ottom-width: 0px; outline-width: 0px; padding-bottom: 6px; padding-top: 6px; outline-style: none; padding-left: 0px; margin: 0px; outline-color: invert; padding-right: 10px">URL-encode 字符串,去除或编码特殊字符。ottom: 0px; outline-width: 0px; padding-bottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">ottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">FILTER_SANITIZE_SPECIAL_CHARS | ottom-width: 0px; outline-width: 0px; padding-bottom: 6px; padding-top: 6px; outline-style: none; padding-left: 0px; margin: 0px; outline-color: invert; padding-right: 10px">HTML 转义字符 ‘”<>& 以及 ASCII 值小于 32 的字符。ottom: 0px; outline-width: 0px; padding-bottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">ottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">FILTER_SANITIZE_EMAIL | ottom-width: 0px; outline-width: 0px; padding-bottom: 6px; padding-top: 6px; outline-style: none; padding-left: 0px; margin: 0px; outline-color: invert; padding-right: 10px">删除所有字符,除了字母、数字以及 !#$%&'*+-/=?^_`{|}~@.[]ottom: 0px; outline-width: 0px; padding-bottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">ottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">FILTER_SANITIZE_URL | ottom-width: 0px; outline-width: 0px; padding-bottom: 6px; padding-top: 6px; outline-style: none; padding-left: 0px; margin: 0px; outline-color: invert; padding-right: 10px">删除所有字符,除了字母、数字以及 $-_.+!*'(),{}|\\^~[]`<>#%”;/?:@&=ottom: 0px; outline-width: 0px; padding-bottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">ottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">FILTER_SANITIZE_NUMBER_INT | ottom-width: 0px; outline-width: 0px; padding-bottom: 6px; padding-top: 6px; outline-style: none; padding-left: 0px; margin: 0px; outline-color: invert; padding-right: 10px">删除所有字符,除了数字和 +-ottom: 0px; outline-width: 0px; padding-bottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">ottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">FILTER_SANITIZE_NUMBER_FLOAT | ottom-width: 0px; outline-width: 0px; padding-bottom: 6px; padding-top: 6px; outline-style: none; padding-left: 0px; margin: 0px; outline-color: invert; padding-right: 10px">删除所有字符,除了数字、+- 以及 .,eE。ottom: 0px; outline-width: 0px; padding-bottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">ottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">FILTER_SANITIZE_MAGIC_QUOTES | ottom-width: 0px; outline-width: 0px; padding-bottom: 6px; padding-top: 6px; outline-style: none; padding-left: 0px; margin: 0px; outline-color: invert; padding-right: 10px">应用 addslashes()。ottom: 0px; outline-width: 0px; padding-bottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">ottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">FILTER_UNSAFE_RAW | ottom-width: 0px; outline-width: 0px; padding-bottom: 6px; padding-top: 6px; outline-style: none; padding-left: 0px; margin: 0px; outline-color: invert; padding-right: 10px">不进行任何过滤,去除或编码特殊字符。ottom: 0px; outline-width: 0px; padding-bottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">ottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">FILTER_VALIDATE_INT | ottom-width: 0px; outline-width: 0px; padding-bottom: 6px; padding-top: 6px; outline-style: none; padding-left: 0px; margin: 0px; outline-color: invert; padding-right: 10px">在指定的范围以整数验证值。ottom: 0px; outline-width: 0px; padding-bottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">ottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">FILTER_VALIDATE_BOOLEAN | ottom-width: 0px; outline-width: 0px; padding-bottom: 6px; padding-top: 6px; outline-style: none; padding-left: 0px; margin: 0px; outline-color: invert; padding-right: 10px">如果是 “1″,“true”,“on” 以及 “yes”,则返回 true,如果是 “0″,“false”,“off”,“no” 以及 “”,则返回 false。否则返回 NULL。ottom: 0px; outline-width: 0px; padding-bottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">ottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">FILTER_VALIDATE_FLOAT | ottom-width: 0px; outline-width: 0px; padding-bottom: 6px; padding-top: 6px; outline-style: none; padding-left: 0px; margin: 0px; outline-color: invert; padding-right: 10px">以浮点数验证值。ottom: 0px; outline-width: 0px; padding-bottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">ottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">FILTER_VALIDATE_REGEXP | ottom-width: 0px; outline-width: 0px; padding-bottom: 6px; padding-top: 6px; outline-style: none; padding-left: 0px; margin: 0px; outline-color: invert; padding-right: 10px">根据 regexp,兼容 Perl 的正则表达式来验证值。ottom: 0px; outline-width: 0px; padding-bottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">ottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">FILTER_VALIDATE_URL | ottom-width: 0px; outline-width: 0px; padding-bottom: 6px; padding-top: 6px; outline-style: none; padding-left: 0px; margin: 0px; outline-color: invert; padding-right: 10px">把值作为 URL 来验证。ottom: 0px; outline-width: 0px; padding-bottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">ottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">FILTER_VALIDATE_EMAIL | ottom-width: 0px; outline-width: 0px; padding-bottom: 6px; padding-top: 6px; outline-style: none; padding-left: 0px; margin: 0px; outline-color: invert; padding-right: 10px">把值作为 e-mail 来验证。ottom: 0px; outline-width: 0px; padding-bottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">ottom: 0px; padding-top: 0px; outline-style: none; padding-left: 0px; margin: 0px; border-left: 0px; outline-color: invert; padding-right: 0px">FILTER_VALIDATE_IP | ottom-width: 0px; outline-width: 0px; padding-bottom: 6px; padding-top: 6px; outline-style: none; padding-left: 0px; margin: 0px; outline-color: invert; padding-right: 10px">把值作为 IP 地址来验证。
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Example #1 A filter_var() example
rush:PHP;">
以上例程会输出:
rush:PHP;">
string(15) "bob@example.com"
bool(false)
以上所述是小编给大家介绍的PHP自带方法验证邮箱、URL、IP是否合法的函数。编程之家 jb51.cc 收集整理的教程希望能对你有所帮助,如果觉得编程之家不错,可分享给好友!感谢支持。
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