问题描述
我正在尝试弄清WordPress中此插件的机制.我有一个preg_match_all函数,如下所示:
I am trying to figure out the mechanics of this plugin in WordPress.I have a preg_match_all function that looks like this:
preg_match_all('/(?<=\\[\\[).+?(?=\\]\\])/', $content, $matches, PREG_PATTERN_ORDER);
$numMatches = count($matches[0]);
for ($i = 0; $i < $numMatches; $i++) {
$postSlug = $matches[0][$i];
}
如果我理解正确,则count($matches[0])
假定$content
中只有一个匹配项.
If I understand this correctly, count($matches[0])
assumes there is only one match in $content
.
我在这里的目标是重新编写for语句,以允许preg_match_all
脚本中的所有匹配项.
My goal here is to re-write the for statement to allow for the full array of matches in the preg_match_all
script.
我假设我应该用foreach ($matches as $postSlug)
代替for语句,而不必担心最后使用混乱的$matches[0][$i]
.
I'm assuming I should replace the for statement with foreach ($matches as $postSlug)
and not even bother with the confusing $matches[0][$i]
at the end.
不幸的是,最终输出似乎没有遍历数组中的每个元素.有任何想法吗?谢谢!
Unfortunately the final output does not seem to loop through each element in the array. Any ideas? Thanks!
推荐答案
不完全; $matches[0]
表示整个正则表达式中的匹配项数组(与$matches[1]
相反,它是正则表达式的第一个匹配组中的匹配项数组).因此,count($matches[0])
是第一个比赛组中的比赛次数.
Not quite; $matches[0]
represents the array of matches in of the whole regular expression (as opposed to, say, $matches[1]
, which would be the array of matches in the first match group of the regular expression). Thus, count($matches[0])
is the number of matches in he first match group.
您可以按照您所说的那样将for
循环重写为foreach
循环,但这可能不会改变任何内容,因为这两种方法都应遍历$matches[0]
中的所有元素.您确定要查找的结果与您的正则表达式匹配吗?
You could do what you've said and rewrite the for
loop as a foreach
loop, but this likely won't change anything, as both methods should traverse all elements in $matches[0]
. Are you certain that the results you're looking for are matched in your regular expression?
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