我在网上发现了以下内容,但我无法实施
(http|ftp|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&:/~\+#]*[\w\-\@?^=%&/~\+#])?
这就是我想要php做的事情:
请执行以下操作:Look here: http://www.rocketlanguages.com/spanish/resources/pronunciation_spanish_accents.php
并将其转换为:Look here: <a href="http://www.rocketlanguages.com/spanish/resources/pronunciation_spanish_accents.php">http://www.rocketlanguages.com/span...anish_accents.php</a>
如果网址很长,那么文本会被中间的<...
分解答案 0 :(得分:1)
试试这个:
// URL regex from here:
// http://daringfireball.net/2010/07/improved_regex_for_matching_urls
define( 'URL_REGEX', <<<'_END'
~(?i)\b((?:[a-z][\w-]+:(?:/{1,3}|[a-z0-9%])|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}/)(?:[^\s()<>]+|\(([^\s()<>]+|(\([^\s()<>]+\)))*\))+(?:\(([^\s()<>]+|(\([^\s()<>]+\)))*\)|[^\s`!()\[\]{};:'".,<>?«»“”‘’]))~
_END
);
// PHP 5.3 or higher, can use closures (anonymous functions)
function replace_urls_with_anchor_tags( $string,
$length = 50,
$elision_string = '...' ) {
$replace_function = function( $matches ) use ( $length, $elision_string) {
$matched_url = $matches[ 0 ];
return '<a href="' . $matched_url . '">' .
abbreviated_url( $matched_url, $length, $elision_string ) .
'</a>';
};
return preg_replace_callback(
URL_REGEX,
$replace_function,
$string
);
}
function abbreviated_url( $url, $length = 50, $elision_string = '...' ) {
if ( strlen( $url ) <= $length ) {
return $url;
}
$width_either_side = (int) ( ( $length - strlen( $elision_string ) ) / 2 );
$left = substr( $url, 0, $width_either_side );
$right = substr( $url, strlen( $url ) - $width_either_side );
return $left . $elision_string . $right;
}
(URL_REGEX定义中的反引号混淆了stackoverflow.com的语法突出显示,但没有什么值得关注的)
函数replace_urls_with_anchor_tags
接受一个字符串,并将匹配的所有URL更改为锚标记,通过省略省略号来缩短长URL。该函数采用可选的length
和elision_string
参数,以防您想要使用长度并将省略号更改为其他内容。
这是一个用法示例:
// Test it out
$test = <<<_END
Look here:
http://www.rocketlanguages.com/spanish/resources/pronunciation_spanish_accents.php
And here:
http://stackoverflow.com/questions/12385770/implementing-web-address-regular-expression
_END;
echo replace_urls_with_anchor_tags( $test, 50, '...' );
// OUTPUT:
// Look here:
// <a href="http://www.rocketlanguages.com/spanish/resources/pronunciation_spanish_accents.php">http://www.rocketlangua...ion_spanish_accents.php</a>
//
// And here:
// <a href="http://stackoverflow.com/questions/12385770/implementing-web-address-regular-expression">http://stackoverflow.co...ress-regular-expression</a>
请注意,如果您使用的是PHP 5.2或更低版本,则必须重写replace_urls_with_anchor_tags
以使用create_function而不是闭包。在PHP 5.3之前没有引入闭包:
// No closures in PHP 5.2, must use create_function()
function replace_urls_with_anchor_tags( $string,
$length = 50,
$elision_string = '...' ) {
$replace_function = create_function(
'$matches',
'return "<a href=\"$matches[0]\">" .
abbreviated_url( $matches[ 0 ], ' .
$length . ', ' .
'"' . $elision_string . '"' .
') . "</a>";'
);
return preg_replace_callback(
URL_REGEX,
$replace_function,
$string
);
}
请注意,我在他的评论中提到的DaveRandom页面上替换了您找到的URL正则表达式。它更完整,实际上你正在使用的正则表达式中存在一个错误 - 几个'/'字符没有被转义(在这里:[\w\-\.,@?^=%&:/~\+#]*[\w\-\@?^=%&/~\+#]
)。此外,它不会检测端口号,如80或8080。
希望这有帮助。
答案 1 :(得分:0)
我正在使用这个正则表达式,它对我来说很好,如果你想要试试这个
(http|https|ftp):\/\/[a-z0-9]+([\-\.]{1}[a-z0-9]+)*\.[a-z]{2,5}(:[0-9]{1,5})?(\/.*)?