锟斤拷 perl 锟侥诧拷同之锟斤拷

锟斤拷锟斤拷锟斤拷锟桔的诧拷同之锟斤拷锟斤拷锟斤拷 perl 5.005锟斤拷鹊摹锟�

  1. 锟斤拷锟杰匡拷锟斤拷使锟斤拷锟街凤拷锟斤拷锟斤拷锟� pcre 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟饺荒拷锟绞癸拷锟� c 锟解函锟斤拷 isspace() 锟叫讹拷一锟斤拷锟街凤拷锟角凤拷锟角空帮拷锟街凤拷锟斤拷通锟斤拷 isspace() 匹锟斤拷崭瘛⒒锟揭筹拷锟斤拷锟斤拷锟斤拷蟹锟斤拷锟� 锟截筹拷锟斤拷锟斤拷水平锟狡憋拷锟斤拷痛锟街憋拷票锟斤拷锟斤拷 Perl5 锟斤拷锟劫斤拷锟斤拷直锟狡憋拷锟斤拷锟斤拷锟斤拷锟斤拷瞻锟斤拷址锟斤拷锟斤拷小锟� \v 锟斤拷锟阶拷锟绞碉拷锟斤拷锟斤拷诤艹锟绞憋拷涠济伙拷械玫锟� perl 锟侥碉拷锟侥筹拷锟较★拷然锟斤拷锟斤拷锟斤拷锟斤拷址锟斤拷锟斤拷锟� 锟斤拷锟斤拷为锟斤拷一锟斤拷锟秸帮拷锟街凤拷锟斤拷锟斤拷锟斤拷锟斤拷 5.002 锟斤拷锟较★拷 锟斤拷 5.004 锟斤拷 5.005 锟斤拷锟斤拷锟斤拷 \s 匹锟戒。
  2. PCRE 锟斤拷锟斤拷锟斤拷前瞻锟斤拷锟皆碉拷锟斤拷锟斤拷锟斤拷锟轿ｏ拷perl 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟解并锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟� 锟斤拷锟界，(?!a){3}锟斤拷锟斤拷锟斤拷味锟脚斤拷锟斤拷锟斤拷 3 锟斤拷锟街凤拷锟斤拷锟斤拷 a锟斤拷锟斤拷锟角讹拷锟斤拷锟斤拷一锟斤拷锟街凤拷锟斤拷锟斤拷 a 锟斤拷锟斤拷锟斤拷锟斤拷 3 锟轿讹拷锟斤拷.
  3. 锟斤拷锟斤拷锟斤拷锟介发锟斤拷锟斤拷锟斤拷锟斤拷前瞻锟斤拷锟斤拷锟斤拷时锟斤拷锟斤拷锟斤拷锟斤拷锟节ｏ拷锟斤拷锟斤拷锟斤拷偏锟斤拷锟斤拷锟斤拷锟叫诧拷没锟斤拷锟斤拷锟斤拷锟斤拷锟角碉拷锟斤拷目锟斤拷 Perl 锟接讹拷锟斤拷失锟斤拷之前匹锟斤拷玫锟斤拷锟斤拷锟叫┠Ｊ狡ワ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟街碉拷锟斤拷锟�(锟斤拷锟斤拷浅晒锟斤拷锟�)锟斤拷 锟斤拷锟斤拷也锟斤拷锟斤拷锟斤拷锟斤拷前瞻锟斤拷锟斤拷只锟斤拷一锟斤拷锟斤拷支锟斤拷时锟斤拷
  4. 锟斤拷锟斤拷目锟斤拷锟街凤拷锟斤拷锟斤拷支锟街讹拷锟斤拷锟斤拷 0 锟街凤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷模式锟街凤拷锟斤拷锟斤拷锟角诧拷锟斤拷锟斤拷模锟斤拷锟轿拷锟斤拷锟斤拷锟酵拷锟斤拷锟酵拷锟� c 锟街凤拷锟斤拷锟斤拷锟捷的ｏ拷锟斤拷 c 锟街凤拷锟斤拷锟斤拷锟斤拷 0 锟街凤拷锟斤拷锟斤拷锟侥★拷转锟斤拷锟斤拷锟斤拷"\x00"锟斤拷锟斤拷锟斤拷模式锟叫憋拷示锟斤拷锟斤拷锟斤拷 0 锟街凤拷锟斤拷
  5. 锟斤拷支锟斤拷锟斤拷锟斤拷锟� perl 转锟斤拷锟斤拷锟叫ｏ拷\l锟斤拷\u锟斤拷 \L锟斤拷 \U锟斤拷 实锟斤拷锟斤拷锟斤拷些锟斤拷锟斤拷通锟斤拷 perl 一锟斤拷锟斤拷址锟斤拷锟斤拷锟斤拷锟斤拷锟绞碉拷锟� 锟侥ｏ拷锟斤拷锟斤拷锟斤拷模式匹锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷帧锟�
  6. 锟斤拷支锟斤拷 perl 锟斤拷 \G 锟斤拷锟皆ｏ拷锟斤拷为锟斤拷锟诫单模式匹锟斤拷没锟叫癸拷系锟斤拷
  7. 锟斤拷锟斤拷然锟斤拷PCRE锟斤拷支锟斤拷(?{code}) 锟斤拷 (??{code})锟侥结构锟斤拷锟斤拷锟斤拷锟斤拷支锟街递癸拷模式锟斤拷
  8. 锟斤拷 perl 5.005_2 锟叫碉拷锟斤拷锟斤拷为锟斤拷锟斤拷锟街凤拷锟斤拷锟斤拷模式锟斤拷锟叫诧拷锟斤拷锟截革拷锟斤拷时锟斤拷锟斤拷锟揭恍╋拷殴值锟斤拷锟斤拷锟斤拷锟斤拷锟� 锟斤拷锟斤拷: /^(a(b)?)+$/ 锟斤拷锟斤拷 aba 锟斤拷时锟斤拷 $2 锟结被锟斤拷锟斤拷为 b锟斤拷然锟斤拷锟斤拷锟斤拷锟斤拷锟侥Ｊ斤拷薷锟轿�/^(aa(bb)?)+$/锟斤拷 锟斤拷aabbaa去匹锟戒，$2锟斤拷锟斤拷锟斤拷玫锟狡ワ拷锟斤拷锟斤拷锟� 锟斤拷锟斤拷锟侥Ｊ斤拷薷锟轿� /^(aa(b(b))?)+$/锟斤拷 $2 锟斤拷 $3 锟街讹拷锟斤拷 锟矫碉拷匹锟斤拷锟斤拷锟斤拷锟斤拷 perl 5.004 锟斤拷 $2 锟斤拷锟解几锟斤拷锟斤拷锟斤拷露锟斤拷芄锟斤拷玫锟狡ワ拷锟斤拷锟斤拷锟斤拷锟斤拷锟� pcre 也锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟� 未锟斤拷 perl 锟睫革拷为一锟斤拷锟角就诧拷同锟剿★拷pcre 锟斤拷锟杰斤拷锟斤拷锟斤拷锟斤拷锟睫革拷.
  9. 锟斤拷锟斤拷一锟斤拷没锟叫斤拷锟斤拷牟锟斤拷锟斤拷锟� perl 5.005_02锟叫ｏ拷模式 /^(a)?(?(1)a|b)+$/ 锟斤拷匹锟斤拷锟街凤拷锟斤拷 "a"锟斤拷 锟斤拷 pcre 锟叫诧拷锟结，然锟斤拷锟斤拷perl 锟斤拷 pcre 锟斤拷 /^(a)?a/ 匹锟斤拷 "a" 锟斤拷锟斤拷玫锟斤拷锟酵拷慕锟斤拷锟斤拷$1 锟斤拷未锟斤拷锟斤拷锟矫★拷

  10. PCRE 锟结供锟斤拷一些锟斤拷 perl 锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷展锟斤拷

    1. 锟斤拷然锟斤拷瞻锟斤拷锟斤拷要锟斤拷锟斤拷锟狡ワ拷锟教讹拷锟斤拷锟饺碉拷锟街凤拷锟斤拷锟斤拷然锟斤拷锟斤拷瞻锟斤拷锟皆碉拷每锟斤拷锟斤拷选锟斤拷支 锟斤拷锟角匡拷锟斤拷使锟矫诧拷同锟斤拷锟饺碉拷锟街凤拷锟斤拷锟侥ｏ拷锟斤拷perl 5.005 锟斤拷要锟斤拷锟斤拷锟角憋拷锟斤拷拥锟斤拷同锟斤拷 锟侥筹拷锟饺★拷
    2. 锟斤拷锟斤拷锟斤拷锟斤拷锟� PCRE_DOLLAR_ENDONLY 锟斤拷锟斤拷没锟斤拷锟斤拷锟斤拷 PCRE_MULTILINE锟斤拷 元锟街凤拷 $ 锟斤拷锟斤拷匹锟斤拷锟街凤拷锟斤拷锟斤拷末尾(锟斤拷锟斤拷锟斤拷某锟斤拷锟斤拷锟叫凤拷之前)锟斤拷
    3. 锟斤拷锟斤拷锟斤拷锟斤拷锟� PCRE_EXTRA锟斤拷 锟斤拷斜锟竭猴拷锟斤拷锟揭伙拷锟矫伙拷锟斤拷锟斤拷夂拷锟斤拷锟街凤拷锟斤拷锟结导锟铰达拷锟斤拷
    4. 锟斤拷锟斤拷锟斤拷锟斤拷锟� PCRE_UNGREEDY锟斤拷 贪锟斤拷锟斤拷锟斤拷锟斤拷锟轿憋拷锟斤拷转锟斤拷也锟斤拷锟斤拷说锟斤拷默锟斤拷锟斤拷锟角讹拷锟角凤拷贪锟斤拷锟斤拷锟剿ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷屎锟斤拷锟斤拷蔷突锟斤拷锟� 贪锟斤拷锟侥★拷(锟斤拷注锟斤拷锟斤拷锟斤拷全锟斤拷贪锟斤拷模式锟斤拷转锟斤拷)