I have two preg_match_all()'s running right now and I'd like to merge them into one. Each finds an occurrence of either functionA or functionB. I know to use "this|that" to match this or that, but when it comes to matching "%this()" or "%that()" I'm not sure if it's best to match "%this()|%that()" or if there's a way to bound what's included on each side of the '|' to write something short like "%this|that()", which I believe would match "%this" and "that()" but not either "this()" or "that()". I'm aware of other ways to solve my particular issue, but I (and hopefully others who find this) would love to know how to properly use "|" without having to repeat the entire string. Here's a more accurate representation:
我现在有两个preg_match_all（）正在运行，我想将它们合并为一个。每个都发现functionA或functionB的出现。我知道使用“this | that”来匹配这个或那个，但是当涉及匹配“％this（）”或“％that（）”时，我不确定是否最好匹配“％this（）| ％that（）“或者是否有办法约束'|'每一侧包含的内容写一些简短的东西，比如“％this | that（）”，我相信它会匹配“％this”和“that（）”，但不能匹配“this（）”或“that（）”。我知道其他方法可以解决我的特定问题，但我（并希望其他人发现这一点）会喜欢知道如何正确使用“|”无需重复整个字符串。这是一个更准确的表示：
$regex = '/%myFunc\(([0-9]+)\)/u';
$one = preg_match_all($regex, $text, $matches);
$regex2 = '/%otherFunc\(([0-9]+)\)/u';
$two = preg_match_all($regex2, $text, $matches2);
The goal is something shorter like:
目标是更短的，如：
$regex = '/%myFunc|otherFunc\(([0-9]+)\)/u';
preg_match_all($regex, $text, $matches);
1 个解决方案
#1
3
Well, you can use parentheses to group expressions and control precedence:
那么，您可以使用括号对表达式进行分组并控制优先级：
%(this|that)\(\)
if you don't want to create a new capturing group you can also use a non-capturing group for that, which is only for precedence and has no side-effects:
如果您不想创建新的捕获组，您还可以使用非捕获组，这仅用于优先级并且没有副作用：
%(?:this|that)\(\)
#1
3
Well, you can use parentheses to group expressions and control precedence:
那么，您可以使用括号对表达式进行分组并控制优先级：
%(this|that)\(\)
if you don't want to create a new capturing group you can also use a non-capturing group for that, which is only for precedence and has no side-effects:
如果您不想创建新的捕获组，您还可以使用非捕获组，这仅用于优先级并且没有副作用：
%(?:this|that)\(\)