Php 正则表达式拆分电子邮件地址
我需要一些php正则表达式的帮助,我想“拆分”电子邮件地址johndoe@example.com“发送至”johndoe“和“@example.com”Php 正则表达式拆分电子邮件地址,php,regex,email,preg-match,Php,Regex,Email,Preg Match,我需要一些php正则表达式的帮助,我想“拆分”电子邮件地址johndoe@example.com“发送至”johndoe“和“@example.com” 到目前为止,我有这样一个:preg_match('/使用explode可能是这里最好的方法,但要使用regex执行此操作,您需要执行以下操作: /^([^@]*)(@.*)/ $email = 'a."b@c".d@e.f'; $parts = explode('@', $email); $user = $parts[0]; $domain
到目前为止,我有这样一个:
preg_match('/使用explode可能是这里最好的方法,但要使用regex执行此操作,您需要执行以下操作:
/^([^@]*)(@.*)/
$email = 'a."b@c".d@e.f';
$parts = explode('@', $email);
$user = $parts[0];
$domain = '@' . $parts[1];
^字符串的开头
([^@]*)任何非@符号($matches[0])的内容
(@.*)@符号后跟任何($matches[1])如果您想要预匹配解决方案,也可以这样做
preg_match('/([^<]+)(@[^<]+)/','johndoe@example.com',$matches);
preg_match('/([^前面的一些答案是错误的,因为一个有效的电子邮件地址实际上可以包含多个@符号,因为它包含在点分隔的引号文本中。请参见以下示例:
$email = 'a."b@c".d@e.f';
echo (filter_var($email, FILTER_VALIDATE_EMAIL) ? 'V' : 'Inv'), 'alid email format.';
有效的电子邮件格式
可以存在多个分隔的文本块和多个@符号。这两个示例都是有效的电子邮件地址:
$email = 'a."b@c".d."@".e.f@g.h';
$email = '/."@@@@@@"./@a.b';
根据Michael Berkowski的爆炸式回答,此电子邮件地址如下所示:
/^([^@]*)(@.*)/
$email = 'a."b@c".d@e.f';
$parts = explode('@', $email);
$user = $parts[0];
$domain = '@' . $parts[1];
用户:a“b”
域名:@c.d
任何使用此解决方案的人都应该提防潜在的滥用。根据这些输出接受电子邮件地址,然后在数据库中插入$email可能会产生负面影响
$email = 'a."b@c".d@INSERT BAD STUFF HERE';
这些函数的内容只有在首先使用过滤器变量进行验证时才是准确的。
从左边开始:
这是一个简单的非正则表达式、非分解的解决方案,用于查找第一个不包含在分隔和引用文本中的@。嵌套分隔文本根据filter_var被视为无效,因此查找适当的@是一个非常简单的搜索
if(filter_var($email, FILTER_VALIDATE_EMAIL)) {
$a = '"';
$b = '.';
$c = '@';
$d = strlen($email);
$contained = false;
for($i = 0; $i < $d; ++$i) {
if($contained) {
if($email[$i] === $a && $email[$i + 1] === $b) {
$contained = false;
++$i;
}
}
elseif($email[$i] === $c)
break;
elseif($email[$i] === $b && $email[$i + 1] === $a) {
$contained = true;
++$i;
}
}
$local = substr($email, 0, $i);
$domain = substr($email, $i);
}
数组([本地]=>a。“b@c.x.“@”.d.e[域]=>@f.g)
错误的电子邮件地址
if(filter_var($email, FILTER_VALIDATE_EMAIL)) {
$domain = strrpos($email, '@');
$local = substr($email, 0, $domain);
$domain = substr($email, $domain);
}
右起:
在对filter_var进行了一些测试并研究了什么是可以接受的有效域名(用点分隔)之后,我创建了这个函数以获得更好的性能。在有效的电子邮件地址中,最后一个@应该是真的@,因为@符号永远不会出现在有效电子邮件地址的域中
if(filter_var($email, FILTER_VALIDATE_EMAIL)) {
$domain = strrpos($email, '@');
$local = substr($email, 0, $domain);
$domain = substr($email, $domain);
}
作为一项功能:
function parse_email($email) {
if(!filter_var($email, FILTER_VALIDATE_EMAIL)) return false;
$a = strrpos($email, '@');
return array('local' => substr($email, 0, $a), 'domain' => substr($email, $a));
}
function parse_email($email) {
if(!filter_var($email, FILTER_VALIDATE_EMAIL)) return false;
$email = explode('@', $email);
$domain = '@' . array_pop($email);
return array('local' => implode('@', $email), 'domain' => $domain);
}
function parse_email($email) {
if(!filter_var($email, FILTER_VALIDATE_EMAIL)) return false;
$email = preg_split('/(.*)(@.*)$/', $email, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
return array('local' => $email[0], 'domain' => $email[1]);
}
function parse_email($email) {
if(!filter_var($email, FILTER_VALIDATE_EMAIL)) return false;
preg_match('/(.*)(@.*)$/', $email, $matches);
return array('local' => $matches[1], 'domain' => $matches[2]);
}
或使用“爆炸”和“内爆”:
if(filter_var($email, FILTER_VALIDATE_EMAIL)) {
$local = explode('@', $email);
$domain = '@' . array_pop($local);
$local = implode('@', $local);
}
作为一项功能:
function parse_email($email) {
if(!filter_var($email, FILTER_VALIDATE_EMAIL)) return false;
$a = strrpos($email, '@');
return array('local' => substr($email, 0, $a), 'domain' => substr($email, $a));
}
function parse_email($email) {
if(!filter_var($email, FILTER_VALIDATE_EMAIL)) return false;
$email = explode('@', $email);
$domain = '@' . array_pop($email);
return array('local' => implode('@', $email), 'domain' => $domain);
}
function parse_email($email) {
if(!filter_var($email, FILTER_VALIDATE_EMAIL)) return false;
$email = preg_split('/(.*)(@.*)$/', $email, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
return array('local' => $email[0], 'domain' => $email[1]);
}
function parse_email($email) {
if(!filter_var($email, FILTER_VALIDATE_EMAIL)) return false;
preg_match('/(.*)(@.*)$/', $email, $matches);
return array('local' => $matches[1], 'domain' => $matches[2]);
}
如果您仍然希望使用正则表达式,则从有效电子邮件地址的末尾开始拆分字符串是最安全的选择
/(.*)(@.*)$/
(.*)匹配任何内容。
(@.*)匹配以@符号开头的任何内容。
$字符串的结尾
if(filter_var($email, FILTER_VALIDATE_EMAIL)) {
$local = preg_split('/(.*)(@.*)$/', $email, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
$domain = $local[1];
$local = $local[0];
}
作为一项功能:
function parse_email($email) {
if(!filter_var($email, FILTER_VALIDATE_EMAIL)) return false;
$a = strrpos($email, '@');
return array('local' => substr($email, 0, $a), 'domain' => substr($email, $a));
}
function parse_email($email) {
if(!filter_var($email, FILTER_VALIDATE_EMAIL)) return false;
$email = explode('@', $email);
$domain = '@' . array_pop($email);
return array('local' => implode('@', $email), 'domain' => $domain);
}
function parse_email($email) {
if(!filter_var($email, FILTER_VALIDATE_EMAIL)) return false;
$email = preg_split('/(.*)(@.*)$/', $email, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
return array('local' => $email[0], 'domain' => $email[1]);
}
function parse_email($email) {
if(!filter_var($email, FILTER_VALIDATE_EMAIL)) return false;
preg_match('/(.*)(@.*)$/', $email, $matches);
return array('local' => $matches[1], 'domain' => $matches[2]);
}
或
作为一项功能:
function parse_email($email) {
if(!filter_var($email, FILTER_VALIDATE_EMAIL)) return false;
$a = strrpos($email, '@');
return array('local' => substr($email, 0, $a), 'domain' => substr($email, $a));
}
function parse_email($email) {
if(!filter_var($email, FILTER_VALIDATE_EMAIL)) return false;
$email = explode('@', $email);
$domain = '@' . array_pop($email);
return array('local' => implode('@', $email), 'domain' => $domain);
}
function parse_email($email) {
if(!filter_var($email, FILTER_VALIDATE_EMAIL)) return false;
$email = preg_split('/(.*)(@.*)$/', $email, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
return array('local' => $email[0], 'domain' => $email[1]);
}
function parse_email($email) {
if(!filter_var($email, FILTER_VALIDATE_EMAIL)) return false;
preg_match('/(.*)(@.*)$/', $email, $matches);
return array('local' => $matches[1], 'domain' => $matches[2]);
}
答复
这解决了Brogan的两种边缘情况(a)。”b@c“.d.”@“。f@g.h
和/。@@@@@@@/@a.b
)如中所示
由于存在多个“@”大小写,因此无效
我爱他,直到我读到他的最后一句话:
在有效电子邮件地址中,最后一个@应为真@,因为@符号不应出现在有效电子邮件地址的域中
if(filter_var($email, FILTER_VALIDATE_EMAIL)) {
$domain = strrpos($email, '@');
$local = substr($email, 0, $domain);
$domain = substr($email, $domain);
}
如果这是真的,他的答案似乎不必要的复杂。使用正则表达式。例如:
$mailadress = "email@company.com";
$exp_arr= preg_match_all("/(.*)@(.*)\.(.*)/",$mailadress,$newarr, PREG_SET_ORDER);
/*
Array output:
Array
(
[0] => Array
(
[0] => email@company.com
[1] => email
[2] => company
[3] => com
)
)
*/
我已经为此创建了一个通用正则表达式,并创建完整电子邮件、用户和域的命名捕获
Regex:
(?<email>(?<mailbox>(?:\w|[!#$%&'*+/=?^`{|}~-])+(?:\.(?:\w|[!#$%&'*+/=?^`{|}~-])+)*)@(?<full_domain>(?<subdomains>(?:(?:[^\W\d_](?:(?:[^\W_]|-)+[^\W_])?)\.)*)(?<root_domain>[^\W\d_](?:(?:[^\W_]|-)+[^\W_])?)\.(?<tld>[^\W\d_](?:(?:[^\W_]|-)+[^\W_])?)))
(?<email> # start Full Email capture
(?<mailbox> # Mailbox
(?:\w|[!#$%&'*+/=?^`{|}~-])+ # letter, number, underscore, or any of these special characters
(?: # Group: allow . in the middle of mailbox; can have multiple but can't be consecutive (no john..smith)
\. # match "."
(?:\w|[!#$%&'*+/=?^`{|}~-])+ # letter, number, underscore, or any of these special characters
)* # allow one letter mailboxes
) # close Mailbox capture
@ # match "@"
(?<full_domain> # Full Domain (including subdomains and tld)
(?<subdomains> # All Subdomains
(?: # label + '.' (so we can allow 0 or more)
(?: # label text
[^\W\d_] # start with a letter (\W is the inverse of \w so we end up with \w minus numbers and _)
(?: # paired with a ? to allow single letter domains
(?:[^\W_]|-)+ # allow letters, numbers, hyphens, but not underscore
[^\W_] # if domain is more than one character, it has to end with a letter or digit (not a hyphen or underscore)
)? # allow one letter sub domains
) # end label text
\.)* # allow 0 or more subdomains separated by '.'
) # close All Subdomains capture
(?<root_domain> # Root Domain
[^\W\d_] # start with a letter
(?: # paired with ? to make characters after the first optional
(?:[^\W_]|-)+ # allow letters, numbers, hyphens
[^\W_] # if domain is more than one character, it has to end with a letter or digit (not a hyphen or underscore)
)? # allow one letter domains
) # close Root Domain capture
\. # separator
(?<tld> # TLD
[^\W\d_] # start with a letter
(?: # paired with ? to make characters after the first optional
(?:[^\W_]|-)+ # allow letters, numbers, hyphens
[^\W_] # if domain is more than one character, it has to end with a letter or digit (not a hyphen)
)? # allow single letter tld
) # close TLD capture
) # close Full Domain capture
) # close Full Email capture
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说明:
(?<email>(?<mailbox>(?:\w|[!#$%&'*+/=?^`{|}~-])+(?:\.(?:\w|[!#$%&'*+/=?^`{|}~-])+)*)@(?<full_domain>(?<subdomains>(?:(?:[^\W\d_](?:(?:[^\W_]|-)+[^\W_])?)\.)*)(?<root_domain>[^\W\d_](?:(?:[^\W_]|-)+[^\W_])?)\.(?<tld>[^\W\d_](?:(?:[^\W_]|-)+[^\W_])?)))
(?<email> # start Full Email capture
(?<mailbox> # Mailbox
(?:\w|[!#$%&'*+/=?^`{|}~-])+ # letter, number, underscore, or any of these special characters
(?: # Group: allow . in the middle of mailbox; can have multiple but can't be consecutive (no john..smith)
\. # match "."
(?:\w|[!#$%&'*+/=?^`{|}~-])+ # letter, number, underscore, or any of these special characters
)* # allow one letter mailboxes
) # close Mailbox capture
@ # match "@"
(?<full_domain> # Full Domain (including subdomains and tld)
(?<subdomains> # All Subdomains
(?: # label + '.' (so we can allow 0 or more)
(?: # label text
[^\W\d_] # start with a letter (\W is the inverse of \w so we end up with \w minus numbers and _)
(?: # paired with a ? to allow single letter domains
(?:[^\W_]|-)+ # allow letters, numbers, hyphens, but not underscore
[^\W_] # if domain is more than one character, it has to end with a letter or digit (not a hyphen or underscore)
)? # allow one letter sub domains
) # end label text
\.)* # allow 0 or more subdomains separated by '.'
) # close All Subdomains capture
(?<root_domain> # Root Domain
[^\W\d_] # start with a letter
(?: # paired with ? to make characters after the first optional
(?:[^\W_]|-)+ # allow letters, numbers, hyphens
[^\W_] # if domain is more than one character, it has to end with a letter or digit (not a hyphen or underscore)
)? # allow one letter domains
) # close Root Domain capture
\. # separator
(?<tld> # TLD
[^\W\d_] # start with a letter
(?: # paired with ? to make characters after the first optional
(?:[^\W_]|-)+ # allow letters, numbers, hyphens
[^\W_] # if domain is more than one character, it has to end with a letter or digit (not a hyphen)
)? # allow single letter tld
) # close TLD capture
) # close Full Domain capture
) # close Full Email capture
(?#开始完整的电子邮件捕获
(?#邮箱
(?:\w |[!#$%&'*+/=?^`{|}-])+#字母、数字、下划线或任何这些特殊字符
(?):允许。在邮箱的中间;可以有多个但不能连续(没有约翰…史密斯)
\“匹配”
(?:\w |[!#$%&'*+/=?^`{|}-])+#字母、数字、下划线或任何这些特殊字符
)*#允许一个信函邮箱
)#关闭邮箱捕获
@#匹配“@”
(?#完整域(包括子域和tld)
(?#所有子域
(?:#label+'。。(因此我们可以允许0或更多)
(?:#标签文本
[^\W\d_35;以字母开头(\W是\W的倒数,因此我们以\W减数和35;结尾)
(?:#与?配对以允许单字母域
(?:[^\W_]|-)+#允许字母、数字、连字符,但不允许下划线
[^\W_]#如果域包含多个字符,则必须以字母或数字(而不是连字符或下划线)结尾
)?#允许一个字母的子域
)#结束标签文本
\)*#允许0个或多个子域以“.”分隔
)#关闭所有子域捕获
(?#根域
以字母开头
(?:#与?配对以使第一个字符后面的字符可选
(?:[^\W_]|-)+#允许字母、数字、连字符
[^\W_]#如果域包含多个字符,则必须以字母或数字(而不是连字符或下划线)结尾
)?#允许一个字母的域
)#关闭根域捕获
\.#分离器
(?#TLD
以字母开头