shell-Regular Expression

One, regular expression
. Represents any single character
650) this.width=650; "height=" src= "http://b287.photo.store.qq.com/psb?/81c1194a-ff39-4e50-b1b1-40057b06260f/ sdbj9wszq8xdepnsuukfasw8eaay*4jnuepopfpw.oo!/b/db8baaaaaaaa&bo=eaeoaqaaaaafeeu! "width=" 376 "style=" vertical-align:top; "alt=" db8baaaaaaaa&bo=eaeoaqaaaaafeeu! "/>
^ Indicates what has been the beginning of what
650) this.width=650; "height=" 204 "src=" http://b288.photo.store.qq.com/psb?/81c1194a-ff39-4e50-b1b1-40057b06260f/ Chqcwpnwu94yzxvt.7j4*nbsu0hmznekwuthmc*5klg!/b/dcabaaaaaaaa&bo=pqhmaaaaaaafefs! "width=" 421 "style=" vertical-align:top; "alt=" dcabaaaaaaaa&bo=pqhmaaaaaaafefs! "/>
$ indicates what has ended
650) this.width=650, "height=", "src=" http://b178.photo.store.qq.com/psb?/81c1194a-ff39-4e50-b1b1-40057b06260f/ z1sbbjkug8qbmd3i9khh32ynahiyxsqwnqc9x6m34*a!/b/dliaaaaaaaaa&bo=xaeaaqaaaaafepc! "width=" 452 "style=" vertical-align:top; "alt=" dliaaaaaaaaa&bo=xaeaaqaaaaafepc! "/>
^$ represents a blank line
650) this.width=650; "height=" src= "http://b288.photo.store.qq.com/psb?/81c1194a-ff39-4e50-b1b1-40057b06260f/ suybdrg6ff9mjs56uwv.*w*zbwuwrmbf4aozf5ququs!/b/dcabaaaaaaaa&bo=qafoaqaaaaafepm! "width=" 424 "style=" vertical-align:top; "alt=" dcabaaaaaaaa&bo=qafoaqaaaaafepm! "/>
[----] matches a single character in parentheses, no matter how many match one of them!!!
650) this.width=650; "height=" 326 "src=" http://b173.photo.store.qq.com/psb?/81c1194a-ff39-4e50-b1b1-40057b06260f/ 11n2yyq0awikjfhftriwzerdjuw5i5co*qirbyvlfl8!/b/dk0aaaaaaaaa&bo=tafgaqaaaaafeme! "width=" 436 "style=" vertical-align:top; "alt=" dk0aaaaaaaaa&bo=tafgaqaaaaafeme! "/>
[] The middle can also 0-9 A-Z to represent a segment of the character
650) this.width=650; "height=" 308 "src=" http://b288.photo.store.qq.com/psb?/81c1194a-ff39-4e50-b1b1-40057b06260f/ qvkx99ibwqtak5xa*sugqic3nari4gdbga58s0vxxce!/b/dcabaaaaaaaa&bo=dqe0aqaaaaafehi! "width=" 373 "style=" vertical-align:top; "alt=" dcabaaaaaaaa&bo=dqe0aqaaaaafehi! "/>
* The user modifies the leading character, indicating that the preceding character appears 0 or more times
650) this.width=650; "height=", "src=" http://b288.photo.store.qq.com/psb?/81c1194a-ff39-4e50-b1b1-40057b06260f/ u73llxpx9hzylxqpyf3zaob0jdnwwa5mxspjwcburtc!/b/dcabaaaaaaaa&bo=rgg0aaaaaaafecg! "width=" 430 "style=" vertical-align:top; "alt=" dcabaaaaaaaa&bo=rgg0aaaaaaafecg! "/>
\? or? Leading character indicates 0 or 1 occurrences
650) this.width=650; "height=" 181 "src=" http://b287.photo.store.qq.com/psb?/81c1194a-ff39-4e50-b1b1-40057b06260f/ godyuctkcweoxehp*bh0anivr4fm9tjedlz*t1hkgs0!/b/db8baaaaaaaa&bo=5wg1aaaaaaafega! "width=" 487 "style=" vertical-align:top; "alt=" db8baaaaaaaa&bo=5wg1aaaaaaafega! "/>
\+ or + leading character indicates 1 or more occurrences
650) this.width=650; "height=" 203 "src=" http://b248.photo.store.qq.com/psb?/81c1194a-ff39-4e50-b1b1-40057b06260f/ far2kz0x5298dqr9qkutc5yzlvj4l3fdvcnb2g3yjdy!/b/dpgaaaaaaaaa&bo=tahlaaaaaaafee0! "width=" 436 "style=" vertical-align:top; "alt=" dpgaaaaaaaaa&bo=tahlaaaaaaafee0! "/>
\{n,x\} indicates a leading character with N to x occurrences
\{n\} Several characters in a row
\{n,\} at least several to infinitely more
650) this.width=650; "height=" 183 "src=" http://b173.photo.store.qq.com/psb?/81c1194a-ff39-4e50-b1b1-40057b06260f/ o6hitz5s.q2okaiq08lvgy6jom0rj2raupqhhcq4bsm!/b/dk0aaaaaaaaa&bo=yag3aaaaaaafee0! "width=" 456 "style=" vertical-align:top; "alt=" dk0aaaaaaaaa&bo=yag3aaaaaaafee0! "/>

\ also use and escape, define meaningful symbols as normal symbols
| or, a|b|c similar to or in a programming language

This article is from the "11627223" blog, please be sure to keep this source http://11637223.blog.51cto.com/11627223/1911982

shell-Regular Expression