对于这种情况,最好的正则表达式是什么?
给出这个URL。
http://php.net/manual/en/function.preg-match.php
我应该如何选择http://php.net
和.php
之间(但不包括)的所有内容。
/manual/en/function.preg-match
这是为Nginx的配置文件。
像这样。
if (preg_match('/(?<=net).*(?=\.php)/', $subject, $regs)) {
$result = $regs[0];
}
解释一下。
"
(?<= # Assert that the regex below can be matched, with the match ending at this position (positive lookbehind)
net # Match the characters “net” literally
)
. # Match any single character that is not a line break character
* # Between zero and unlimited times, as many times as possible, giving back as needed (greedy)
(?= # Assert that the regex below can be matched, starting at this position (positive lookahead)
\. # Match the character “.” literally
php # Match the characters “php” literally
)
"
这种一般的URL匹配允许你选择URL的一部分。
if (preg_match('/\\b(?P<protocol>https?|ftp):\/\/(?P<domain>[-A-Z0-9.]+)(?P<file>\/[-A-Z0-9+&@#\/%=~_|!:,.;]*)?(?P<parameters>\\?[-A-Z0-9+&@#\/%=~_|!:,.;]*)?/i', $subject, $regs)) {
$result = $regs['file'];
//or you can append the $regs['parameters'] too
} else {
$result = "";
}