問題描述

我想弄清楚這個插件在 WordPress 中的機制.我有一個看起來像這樣的 preg_match_all 函數:

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];
}

如果我理解正確，count($matches[0]) 假設 $content 中只有一個匹配項.

If I understand this correctly, count($matches[0]) assumes there is only one match in $content.

我的目標是重新編寫 for 語句以允許 preg_match_all 腳本中的完整匹配數組.

My goal here is to re-write the for statement to allow for the full array of matches in the preg_match_all script.

我假設我應該用 foreach ($matches as $postSlug) 替換 for 語句，甚至不打擾令人困惑的 $matches[0][$i]代碼>在最后.

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，最終輸出似乎沒有遍歷數組中的每個元素.有任何想法嗎?謝謝！

Unfortunately the final output does not seem to loop through each element in the array. Any ideas? Thanks!

推薦答案

如果我理解正確，count($matches[0] 假設 $content 中只有一個匹配項.

If I understand this correctly, count($matches[0] assumes there is only one match in $content.

不完全是；$matches[0] 表示整個正則表達式中的匹配數組(而不是 $matches[1]，它是匹配數組在正則表達式的第一個匹配組中).因此，count($matches[0]) 是第一個匹配組中的匹配數.

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.

你可以按照你說的做，將 for 循環(huán)重寫為 foreach 循環(huán)，但這可能不會改變任何東西，因為這兩種方法都應該遍歷所有$matches[0] 中的元素.您確定您要查找的結果與您的正則表達式匹配嗎?

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?

這篇關于迭代來自 preg_match_all 的匹配項的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！