{"id":33843,"date":"2023-02-14T14:58:39","date_gmt":"2023-02-14T09:28:39","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-preg_match-on-multiline-text\/"},"modified":"2023-02-14T14:58:39","modified_gmt":"2023-02-14T09:28:39","slug":"solved-preg_match-on-multiline-text","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-preg_match-on-multiline-text\/","title":{"rendered":"[Solved] Preg_match on multiline text"},"content":{"rendered":"

[ad_1]
\n<\/p>\n

\n
\n
<\/div>\n
\n
\n

The idea is to avoid the issue of new lines by not using the dot ($subject<\/code> is your string):<\/p>\n

$pattern = '~\n    Project\\hNo\\.\\h\\d++\\hDATE\\h\n    (?<date>\\d{1,2}\\\/\\d{1,2}\\\/\\d{1,2})\n    \\s++No\\.\\hQUESTION\\hANSWER\\s++\n    (?<No>\\d++)\\s++\n\n    # all characters but D or D not followed by \"ate Required\"\n    (?<desc>(?>[^D]++|D(?!ate\\hRequired))+)\n\n    \\D++\n    (?<date_required>\\d{1,2}\\\/\\d{1,2}\\\/\\d{1,2})\n~x';\n\npreg_match_all($pattern, $subject, $matches, PREG_SET_ORDER);\n\nprint_r($matches);\n<\/code><\/pre>\n
Note that i use possessive quantifiers<\/a> and atomic groups<\/a> to avoid as possible backtracks<\/p>\n
EDIT:<\/h3>\n
According to your new example string, i give you a new type of pattern (in a kind of lex style) that is more readable and more editable:<\/p>\n
$pattern = <<<LOD\n~\n # Raw types\n (?(DEFINE)(?<uint>  \\d++                      ))\n (?(DEFINE)(?<date>  \\d{1,2}\\\/\\d{1,2}\\\/\\d{1,2} ))\n\n # Custom types\n (?(DEFINE)(?<void>  (?>\\s++|<br\\b[^>]*+>)*           ))\n (?(DEFINE)(?<desc>  (?>[^D]++|D(?!ate\\h++Required))+ ))\n\n # Anchors\n (?(DEFINE)(?<A_prj_date>      PROJECT(?>[^D]++|D(?!ATE\\b))+DATE\\h*+    ))\n (?(DEFINE)(?<A_prj_number>    \\g<void>No\\.\\h++QUESTION\\h++ANSWER\\b\\D++ ))\n (?(DEFINE)(?<A_prj_desc>      \\g<void>                                 ))\n (?(DEFINE)(?<A_prj_date_req>  Date\\h++Required\\D++                     ))\n\n # Pattern\n \\g<A_prj_date>     (?<prj_date>      \\g<date> )\n \\g<A_prj_number>   (?<prj_number>    \\g<uint> )\n \\g<A_prj_desc>     (?<prj_desc>      \\g<desc> )\n \\g<A_prj_date_req> (?<prj_date_req>  \\g<date> )    \n\n~xi\nLOD;\n<\/code><\/pre>\n
It begins with the definition of each component you need.<\/p>\n
    \n
  1. Raw types: subpatterns that you can see everywhere<\/li>\n
  2. Custom types: subpatterns specific to your project<\/li>\n
  3. Anchors: subpatterns that describe the transition between required fields<\/li>\n<\/ol>\n
    After, you have the pattern itself composed with these elements.<\/p>\n
    You obtain something highly editable, since you can adapt all subpatterns to you needs, add new subpatterns and compose new subpatterns with others.<\/p>\n
    Example, you can try to replace the A_prj_number<\/i> subpattern with \\D++<\/code> that seems to be good enough for your example string:<\/p>\n
    (?(DEFINE)(?<A_prj_number>\\D++))\n<\/code><\/pre>\n
    Another advantage of this syntax, you can easily debug your pattern commenting one by one the elements (in the pattern section) from last to first until you obtain a match:<\/p>\n
    # Pattern\n \\g<A_prj_date>     (?<prj_date>      \\g<date> )\n \\g<A_prj_number>   (?<prj_number>    \\g<uint> )\n # \\g<A_prj_desc>     (?<prj_desc>      \\g<desc> )\n # \\g<A_prj_date_req> (?<prj_date_req>  \\g<date> ) \n<\/code><\/pre>\n
    note: if you have only one project by string use preg_match<\/i> instead of preg_match_all<\/i>.<\/p>\n<\/p><\/div>\n
    <\/div>\n<\/div>\n
                2<\/span> <\/p><\/div>\n<\/div>\n
    [ad_2]<\/p>\n
    solved Preg_match on multiline text <\/p>\n","protected":false},"excerpt":{"rendered":"
    [ad_1] The idea is to avoid the issue of new lines by not using the dot ($subject is your string): $pattern = ‘~ Project\\hNo\\.\\h\\d++\\hDATE\\h (?<date>\\d{1,2}\\\/\\d{1,2}\\\/\\d{1,2}) \\s++No\\.\\hQUESTION\\hANSWER\\s++ (?<No>\\d++)\\s++ # all characters but D or D not followed by “ate Required” (?<desc>(?>[^D]++|D(?!ate\\hRequired))+) \\D++ (?<date_required>\\d{1,2}\\\/\\d{1,2}\\\/\\d{1,2}) ~x’; preg_match_all($pattern, $subject, $matches, PREG_SET_ORDER); print_r($matches); Note that i use possessive quantifiers and … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[339,1952],"class_list":["post-33843","post","type-post","status-publish","format-standard","hentry","category-solved","tag-php","tag-preg-match"],"yoast_head":"\n[Solved] Preg_match on multiline text - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-preg_match-on-multiline-text\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Preg_match on multiline text - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] The idea is to avoid the issue of new lines by not using the dot ($subject is your string): $pattern = '~ ProjecthNo.hd++hDATEh (?<date>d{1,2}\/d{1,2}\/d{1,2}) s++No.hQUESTIONhANSWERs++ (?<No>d++)s++ # all characters but D or D not followed by "ate Required" (?<desc>(?>[^D]++|D(?!atehRequired))+) D++ (?<date_required>d{1,2}\/d{1,2}\/d{1,2}) ~x'; preg_match_all($pattern, $subject, $matches, PREG_SET_ORDER); print_r($matches); Note that i use possessive quantifiers and ... 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