alnum

If "^" is displayed in "[]", this expression does not match the characters in, for example, "/[^ a-z]/" does not match any lower-case letters! The regular expression provides the following default values:'[: Alnum:]' matches any letterAlphanumeric

If "^" appears in "[]", this expression does not match the characters appearing in "[]", such as "/[^a-z]/" does not match any lowercase letters! And the regular expression gives several default values for "[]", as follows: ' [: alnum:] ' matches

Oracle Regular expressions use the introduction of regular expressions with powerful, convenient and efficient text processing capabilities. Ability to add, delete, analyze, overlay, insert, and reshape various types of text and data. Oracle

The following examples illustrate how to use regular expressions to solve common problems in work.1.REGEXP_SUBSTRThe REGEXP_SUBSTR function uses a regular expression to specify the start and end points of the returned string, and returns the same

ProgramThe employee is very lazy. We all know that the member variables need to be initialized, or the problem may be very painful. However, for a class with 50 variables, it is silly to write the initialization method one by one, and it cannot be

The following examples illustrate the use of regular expressions to handle problems that are common in some jobs. 1. Regexp_substr The REGEXP_SUBSTR function uses regular expressions to specify the start and end points of the return string, and to

Requirements: Match the mobile phone number. The first digit can be "+", but not "+". The following digits are all numbers, for example: + 861359415665 8613659558555 1356856455 Are valid.   + Aa156945555 Aa1359556666 Aaddssdfdfsd Are

Demand:Match the phone number, the first bit can be +, can not +, the back of all if the number, such as:+86135941566586136595585551356856455are legal.+aa156945555aa1359556666Aaddssdfdfsdare not legal.Regular:[SQL]View Plaincopyprint? Sql>

Demand:Match the phone number, the first bit can be +, can not +, the back of all if the number, such as:+86135941566586136595585551356856455are legal.+aa156945555aa1359556666Aaddssdfdfsdare not legal.Regular:[SQL]View Plaincopyprint? Sql>

Bodyonloadf. a. select ();? Phpechoa :. htmlspecialchars ($ a); echobra1:; $ a1eregi_replace (^ [_.] [: alnum:]-] + @ ([[: alnum:] [[: alnum:]-] *.) + [[: alpha:] {2, 3} $), ahrefmailto: 11a, $ a); echohtmlspecialchars ($ a1); echobra1: $ a1;

Bodyonloadf. a. select ();? Phpechoa :. htmlspecialchars ($ a); echobra1:; $ a1eregi_replace (^ [_.] [: alnum:]-] + @ ([[: alnum:] [[: alnum:]-] *.) + [[: alpha:] {2, 3} $), ahrefmailto: Echo 'A: '.html specialchars ($ ); Echo' A1 :'; $

Echo ' A: '. Htmlspecialchars ($a); Echo ' A1: '; $a 1 = eregi_replace (' (^[_.) [: alnum:]-]+@ ([: alnum:]][[:alnum:]-]*.) +[[:alpha:]]{2,3}$) ', ' 1 ', $a); Echo htmlspecialchars ($a 1); echo " A1: $a 1 "; Echo ' A2: '; $a 2 = eregi_replace (' ([[:

Regular ExpressionsRegexp_like performing Regular expression matchingSELECT first_nameFrom EMPLOYEESWHERE regexp_like (first_name, ' ^al (An|yss) a$ ', ' I ');--al is followed by an OR YssSELECT first_nameFrom EMPLOYEESWHERE regexp_like (first_name,

REGEXP_LIKE (matching)REGEXP_INSTR (included)REGEXP_REPLACE (replace)REGEXP_SUBSTR (extract) For example, the expression of the mobile phone number: ^ [1] {1} [35] {1} [[: digit:] {9} $You can query customer information tables (tKHXX) that contain

Echo 'a: '.html specialchars ($ );Echo ' a1 :';$ A1 = eregi_replace ('(^ [_.] [: alnum:]-] + @ ([[: alnum:] [[: alnum:]-] *.) + [[: alpha:] {2, 3} $) ',' 1 ', $ );Echo htmlspecialchars ($ a1 );Echo " a1: $ a1 ";Echo ' a2 :';$ A2 = eregi_replace ('(

Echo 'a: '.html specialchars ($ );Echo ' a1 :';$ A1 = eregi_replace ('(^ [_.] [: alnum:]-] + @ ([[: alnum:] [[: alnum:]-] *.) + [[: alpha:] {2, 3} $) ',' 1 ', $ );Echo htmlspecialchars ($ a1 );Echo " a1: $ a1 ";Echo ' a2 :';$ A2 = eregi_replace ('(

Regular expression matching an email address: w+ ([-+.] w+) *@w+ ([-.] w+) *.w+ ([-.] w+) *Regular expressions that match URL URLs: [a-za-z]+://[^s]* Let's look at an example Echo ' A: '. Htmlspecialchars ($a); Echo ' a1: '; $a 1 =

Data acquisition, most of the regular expression, I simply introduce how to achieve the idea of acquisition. This is the implementation of PHP. It's not wise to put it in the space, because it's not only very resource-intensive but also supports

Most of the data is collected using regular expressions. I will briefly introduce how to implement data collection. this is the php implementation. it is generally run on the local machine and it is unwise to put it into space, because not only does

Pattern matching for MySQL WHERE clauseToday in the application of this problem encountered,There is a field T1, where the value is similar to: 1,1,1,2,3,3,4,4,5,5,2,4,3,2,1,2Need to search from inside for example: the first comma before the number