PCRE_CASELESS, PCRE_MULTILINE, PCRE_DOTALL, PCRE_UNGREEDY, PCRE_EXTRA, PCRE_EXTENDED and PCRE_DUPNAMES 锟斤拷模式锟斤拷锟轿凤拷锟斤拷锟矫匡拷锟斤拷锟斤拷模式锟节诧拷通锟斤拷一锟斤拷 perl 选锟斤拷锟街凤拷锟斤拷锟斤拷锟斤拷锟斤拷锟矫o拷 锟斤法为:(?锟斤拷锟轿凤拷)锟斤拷锟斤拷锟矫碉拷锟斤拷锟轿凤拷锟叫o拷
i | for PCRE_CASELESS |
m | for PCRE_MULTILINE |
s | for PCRE_DOTALL |
x | for PCRE_EXTENDED |
U | for PCRE_UNGREEDY |
X | for PCRE_EXTRA |
J | for PCRE_INFO_JCHANGED |
锟斤拷锟界,(?im) 锟斤拷锟矫憋拷锟斤拷锟斤拷锟叫达拷小写锟斤拷锟斤拷锟斤拷匹锟戒。同锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷取锟斤拷锟斤拷些锟斤拷锟矫o拷 锟斤拷锟斤拷 (?im-sx) 锟斤拷锟斤拷锟斤拷 PCRE_CASELESS锟斤拷PCRE_MULTILINE锟斤拷 锟斤拷锟斤拷同时取锟斤拷锟斤拷 PCRE_DOTALL 锟斤拷 PCRE_EXTENDED锟斤拷 锟斤拷锟揭伙拷锟斤拷锟侥革拷锟斤拷锟斤拷锟斤拷锟� - 之前, 也锟斤拷锟斤拷锟斤拷 - 之锟斤拷锟斤拷锟窖★拷畋蝗★拷锟斤拷锟斤拷谩锟�
锟斤拷一锟斤拷选锟斤拷锟斤拷模式锟斤拷锟斤拷锟较硷拷(也锟斤拷锟斤拷说锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷)时锟斤拷 锟斤拷锟斤拷谋锟斤拷影锟斤拷模式锟斤拷剩锟洁部锟街★拷锟斤拷锟斤拷 /ab(?i)c/ 锟斤拷锟斤拷匹锟斤拷 "abc" 锟斤拷 "abC"锟斤拷 锟斤拷锟斤拷锟绞斤拷锟� PCRE 4.0(PHP 4.3.3) 锟叫憋拷锟侥变。锟节达拷之前锟侥版本锟叫o拷 /ab(?i)c/ 锟斤拷为锟斤拷 /abc/i 锟斤拷全一锟铰★拷
锟斤拷锟揭伙拷锟窖★拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷茫锟斤拷锟斤拷锟斤拷锟接帮拷锟斤拷遣锟酵拷摹锟斤拷锟斤拷锟� perl 5.005 锟斤拷锟斤拷为锟斤拷一锟斤拷锟斤拷锟街★拷 一锟斤拷选锟斤拷锟斤拷锟斤拷锟斤拷锟节诧拷锟斤拷锟矫o拷锟斤拷锟斤拷锟侥憋拷锟斤拷锟斤拷锟斤拷剩锟斤拷牟锟斤拷郑锟� 锟斤拷锟� (a(?i)b)c 锟斤拷锟斤拷匹锟斤拷 "abc" 锟斤拷 "aBc" (锟斤拷锟斤拷没锟斤拷使锟斤拷 PCRE_CASELESS 选锟斤拷)锟斤拷 锟斤拷锟斤拷锟轿讹拷锟窖★拷锟斤拷锟侥J斤拷牟锟酵伙拷每锟斤拷锟斤拷锟缴诧拷同锟斤拷影锟届。 锟斤拷同一锟斤拷锟斤拷模式锟叫o拷 一锟斤拷锟斤拷支锟斤拷选锟斤拷锟斤拷锟矫回达拷透锟斤拷锟斤拷锟斤拷剩锟斤拷锟斤拷锟斤拷锟斤拷锟街э拷锟饺ワ拷锟� 锟斤拷锟斤拷 (a(?i)b|c) 匹锟斤拷"ab"锟斤拷 "aB"锟斤拷 "c" 锟斤拷 "C"锟斤拷 锟斤拷锟斤拷锟斤拷匹锟斤拷 "C" 时锟斤拷一锟斤拷锟斤拷支锟斤拷锟斤拷选锟筋被锟借定前锟酵憋拷锟斤拷锟斤拷锟斤拷 锟斤拷锟斤拷锟斤拷为选锟斤拷锟斤拷瓒拷锟斤拷诒锟斤拷锟斤拷锟饺凤拷锟斤拷模锟斤拷锟斤拷锟斤拷锟杰伙拷锟斤拷锟斤拷浅锟斤拷锟斤拷锟斤拷锟斤拷为锟斤拷
PCRE 专锟斤拷选锟斤拷 PCRE_UNGREEDY 锟斤拷 PCRE_EXTRA 锟斤拷锟皆猴拷 perl 锟斤拷锟斤拷选锟斤拷锟斤拷同锟斤拷锟侥凤拷式锟斤拷锟侥变, 锟街憋拷使锟斤拷锟斤拷母 U 锟斤拷 X. (?X) 锟斤拷锟斤拷瓒拷锟叫╋拷锟斤拷猓拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟轿猴拷锟斤拷锟斤拷锟斤拷锟斤拷之前锟斤拷 锟斤拷梅锟斤拷锟斤拷羁凤拷锟轿伙拷谩锟�