如何使 PHP Regex Option-Group 不急切？
How to make a PHP Regex Option-Group not eager?
我有一个正则表达式，用于查找以 ngram 选项组结尾的模式。这是正则表达式：
$regex = '/.{0,150}\b(is (.{0,50}?)\b(assembler|builder|consulter|contracter|contractor|contract manufacturer|converter|designer|distributer|distributor|engineerer|fabricater|fabricator|formulater|formulator|installer|machiner|manufacturer|offerer|producer|provider|reseller|seller|supplier|wholesaler|machine shop|job shop|law firm|marketer|marketing agency))\b([^.!?<>]{0,150})\b/'
这是我匹配的字符串：
$string = 'ABC Company Inc. is a Distributor, Fabricator, and Manufacturer of textiles. Another sentence.';
目标是使用正则表达式的第一个捕获组提取 "is a Distributor, Fabricator, and Manufacturer"。正则表达式的其余部分只是定义上下文，理想情况下，通常在句子末尾或一定长度后结束。
现在，我的第一个捕获组很急切并且只匹配 "is a Distributor"。我怎样才能让它不急切？
.{0,150}\b(is (.{0,50}?)\b(assembler|builder|consulter|contracter|contractor|contract manufacturer|converter|designer|distributer|distributor|engineerer|fabricater|fabricator|formulater|formulator|installer|machiner|manufacturer|offerer|producer|provider|reseller|seller|supplier|wholesaler|machine shop|job shop|law firm|marketer|marketing agency)(.*?\b(assembler|builder|consulter|contracter|contractor|contract manufacturer|converter|designer|distributer|distributor|engineerer|fabricater|fabricator|formulater|formulator|installer|machiner|manufacturer|offerer|producer|provider|reseller|seller|supplier|wholesaler|machine shop|job shop|law firm|marketer|marketing agency))*)\b([^.!?<>]{0,150})\b
这个超长的正则表达式可以做到这一点。查看演示。
没有重复的更短版本（不在代码标签中，因为一行不可读）：
.{0,150}\b(is([^.!?<>]{0,50}(assembler|builder|consulter|contracter|contractor|contract manufacturer|converter|designer|distributer|distributor|engineerer|fabricater|fabricator|formulater|formulator|installer|machiner|manufacturer|offerer|producer|provider|reseller|seller|supplier|wholesaler|machine shop|job shop|law firm|marketer|marketing agency))+)\b([^.!?<>]{0,150}\b)
想法是允许每个关键字前的前缀不超过 50 个符号（幸运的是，只有一个这样的常量，所以很容易找到），无论它是否是枚举中的另一个关键字。为了捕获枚举，我在关键字列表后添加了 +)。
勾选here。
我有一个正则表达式，用于查找以 ngram 选项组结尾的模式。这是正则表达式：
$regex = '/.{0,150}\b(is (.{0,50}?)\b(assembler|builder|consulter|contracter|contractor|contract manufacturer|converter|designer|distributer|distributor|engineerer|fabricater|fabricator|formulater|formulator|installer|machiner|manufacturer|offerer|producer|provider|reseller|seller|supplier|wholesaler|machine shop|job shop|law firm|marketer|marketing agency))\b([^.!?<>]{0,150})\b/'
这是我匹配的字符串：
$string = 'ABC Company Inc. is a Distributor, Fabricator, and Manufacturer of textiles. Another sentence.';
目标是使用正则表达式的第一个捕获组提取 "is a Distributor, Fabricator, and Manufacturer"。正则表达式的其余部分只是定义上下文，理想情况下，通常在句子末尾或一定长度后结束。
现在，我的第一个捕获组很急切并且只匹配 "is a Distributor"。我怎样才能让它不急切？
.{0,150}\b(is (.{0,50}?)\b(assembler|builder|consulter|contracter|contractor|contract manufacturer|converter|designer|distributer|distributor|engineerer|fabricater|fabricator|formulater|formulator|installer|machiner|manufacturer|offerer|producer|provider|reseller|seller|supplier|wholesaler|machine shop|job shop|law firm|marketer|marketing agency)(.*?\b(assembler|builder|consulter|contracter|contractor|contract manufacturer|converter|designer|distributer|distributor|engineerer|fabricater|fabricator|formulater|formulator|installer|machiner|manufacturer|offerer|producer|provider|reseller|seller|supplier|wholesaler|machine shop|job shop|law firm|marketer|marketing agency))*)\b([^.!?<>]{0,150})\b
这个超长的正则表达式可以做到这一点。查看演示。
没有重复的更短版本（不在代码标签中，因为一行不可读）：
.{0,150}\b(is([^.!?<>]{0,50}(assembler|builder|consulter|contracter|contractor|contract manufacturer|converter|designer|distributer|distributor|engineerer|fabricater|fabricator|formulater|formulator|installer|machiner|manufacturer|offerer|producer|provider|reseller|seller|supplier|wholesaler|machine shop|job shop|law firm|marketer|marketing agency))+)\b([^.!?<>]{0,150}\b)
想法是允许每个关键字前的前缀不超过 50 个符号（幸运的是，只有一个这样的常量，所以很容易找到），无论它是否是枚举中的另一个关键字。为了捕获枚举，我在关键字列表后添加了 +)。
勾选here。