从字符串中提取电子邮件地址 - php
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Extract email address from string - php
提问by Liz.
I want to extract email address from a string, for example:
我想从字符串中提取电子邮件地址，例如：
<?php // code
$string = 'Ruchika <[email protected]>';
?>
From the above string I only want to get email address [email protected].
从上面的字符串中，我只想获取电子邮件地址[email protected]。
Kindly, recommend how to achieve this.
请推荐如何实现这一目标。
回答by Niranjan N Raju
Try this
尝试这个
<?php
$string = 'Ruchika < [email protected] >';
$pattern = '/[a-z0-9_\-\+\.]+@[a-z0-9\-]+\.([a-z]{2,4})(?:\.[a-z]{2})?/i';
preg_match_all($pattern, $string, $matches);
var_dump($matches[0]);
?>
see demo here
Second method
第二种方法
<?php
$text = 'Ruchika < [email protected] >';
preg_match_all("/[\._a-zA-Z0-9-]+@[\._a-zA-Z0-9-]+/i", $text, $matches);
print_r($matches[0]);
?>
See demo here
回答by Jacques
Parsing e-mail addresses is an insane work and would result in a very complicated regular expression. For example, consider this official regular expression to catch an e-mail address: http://www.ex-parrot.com/pdw/Mail-RFC822-Address.html
解析电子邮件地址是一项疯狂的工作，会导致非常复杂的正则表达式。例如，考虑使用这个官方正则表达式来捕获电子邮件地址：http: //www.ex-parrot.com/pdw/Mail-RFC822-Address.html
Amazing right?
很惊人吧？
Instead, there is a standard php function to do this called mailparse_rfc822_parse_addresses()and documented here.
相反，有一个标准的 php 函数可以执行此操作，mailparse_rfc822_parse_addresses()并在此处进行了记录。
It takes a string as argument and returns an array of associative array with keys display, address and is_group.
它接受一个字符串作为参数并返回一个关联数组的数组，键为 display、address 和 is_group。
So,
所以，
$to = 'Wez Furlong <[email protected]>, [email protected]';
var_dump(mailparse_rfc822_parse_addresses($to));
would yield:
会产生：
array(2) {
[0]=>
array(3) {
["display"]=>
string(11) "Wez Furlong"
["address"]=>
string(15) "[email protected]"
["is_group"]=>
bool(false)
}
[1]=>
array(3) {
["display"]=>
string(15) "[email protected]"
["address"]=>
string(15) "[email protected]"
["is_group"]=>
bool(false)
}
}
回答by julianm
This is based on Niranjan's response, assuming you have the input email enclosed within < and > characters). Instead of using a regular expression to grab the email address, here I get the text part between the < and > characters. Otherwise, I use the string to get the entire email. Of course, I didn't make any validation on the email address, this will depend on your scenario.
这是基于 Niranjan 的回复，假设您将输入电子邮件包含在 < 和 > 字符中）。在这里我没有使用正则表达式来获取电子邮件地址，而是获取 < 和 > 字符之间的文本部分。否则，我使用字符串来获取整个电子邮件。当然，我没有对电子邮件地址进行任何验证，这取决于您的情况。
<?php
$string = 'Ruchika <[email protected]>';
$pattern = '/<(.*?)>/i';
preg_match_all($pattern, $string, $matches);
var_dump($matches);
$email = $matches[1][0] ?? $string;
echo $email;
?>
Here is a forked demo.
这是一个分叉的演示。
Of course, if my assumption isn't correct, then this approach will fail. But based on your input, I believe you wanted to extract emails enclosed within < and > chars.
当然，如果我的假设不正确，那么这种方法就会失败。但是根据您的输入，我相信您想提取 < 和 > 字符中包含的电子邮件。
回答by Priya Rajaram
try this code.
试试这个代码。
<?php
function extract_emails_from($string){
preg_match_all("/[\._a-zA-Z0-9-]+@[\._a-zA-Z0-9-]+/i", $string, $matches);
return $matches[0];
}
$text = "blah blah blah blah blah blah [email protected]";
$emails = extract_emails_from($text);
print(implode("\n", $emails));
?>
This will work.
这将起作用。
Thanks.
谢谢。
回答by katwekibs
This will work even on subdomains. It extracts all emails from text.
这甚至适用于子域。它从文本中提取所有电子邮件。
$marches[0]has all emails.
$marches[0]有所有电子邮件。
$pattern = "/[a-zA-Z0-9-_]{1,}@[a-zA-Z0-9-_]{1,}(.[a-zA-Z]{1,}){1,}/";
preg_match_all ($pattern , $string, $matches);
print_r($matches);
$marches[0]has all emails.
$marches[0]有所有电子邮件。
Array
(
[0] => Array
(
[0] => [email protected]
[1] => **********@******.co.za.com
[2] => [email protected]
[3] => [email protected]
[4] => [email protected]
)
[1] => Array
(
[0] => .com
[1] => .com
[2] => .com
[3] => .com
[4] => .com
)
)
回答by Janith Chinthana
Found some useful codesas bellow,
找到了一些有用的代码，如下所示，
<?php
// input: My Test Email <[email protected]>
function get_displayname_from_rfc_email($rfc_email_string) {
// match all words and whitespace, will be terminated by '<'
$name = preg_match('/[\w\s]+/', $rfc_email_string, $matches);
$matches[0] = trim($matches[0]);
return $matches[0];
}
// Output: My Test Email
function get_email_from_rfc_email($rfc_email_string) {
// extract parts between the two parentheses
$mailAddress = preg_match('/(?:<)(.+)(?:>)$/', $rfc_email_string, $matches);
return $matches[1];
}
// Output: [email protected]
?>
Hope this will help to someone.
希望这会对某人有所帮助。
回答by Guido K.B.W. üffing
use (my) function getEmailArrayFromStringto easily extract email adresses from a given string.
使用 (my) 函数 getEmailArrayFromString可以轻松地从给定的字符串中提取电子邮件地址。
<?php
function getEmailArrayFromString($sString = '')
{
$sPattern = '/[\._\p{L}\p{M}\p{N}-]+@[\._\p{L}\p{M}\p{N}-]+/u';
preg_match_all($sPattern, $sString, $aMatch);
$aMatch = array_keys(array_flip(current($aMatch)));
return $aMatch;
}
// Example
$sString = '[email protected] XXX [email protected] XXX <[email protected]>';
$aEmail = getEmailArrayFromString($sString);
/**
* array(3) {
[0]=>
string(15) "[email protected]"
[1]=>
string(15) "[email protected]"
[2]=>
string(15) "[email protected]"
}
*/
var_dump($aEmail);
回答by Chandra Mani Pandey
you can also try:
你也可以尝试：
email=re.findall(r'\S+@\S+','[email protected]')
print email
where \Smeans any non-whitespace character
where\S表示任何非空白字符
