Of Stack

PHP Collection of Common Regular Expressions

  • 2021-07-13 04:40:31
  • OfStack

Regular expressions are often used to do websites at ordinary times. The following are some explanations and examples for your reference and modification only: 


  "^\d+$" 　　 // Non-negative integer (positive integer  + 0 )  
  "^[0-9]*[1-9][0-9]*$" 　　 // Positive integer  
  "^((-\d+)|(0+))$" 　　 // Non-positive integer (negative integer  + 0 )  
  "^-[0-9]*[1-9][0-9]*$" 　　 // Negative integer  
  "^-?\d+$"  　　  　　  // Integer  
  "^\d+(\.\d+)?$" 　　 // Non-negative floating-point numbers (positive floating-point numbers)  + 0 )  
  "^(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$" 　　 // Positive floating point number  
  "^((-\d+(\.\d+)?)|(0+(\.0+)?))$" 　　 // Non-positive floating point number (negative floating point number)  + 0 )  
  "^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$" 　　 // Negative floating point number  
  "^(-?\d+)(\.\d+)?$" 　　 // Floating point number  
  "^[A-Za-z]+$" 　　 // By 26 A string consisting of three English letters  
  "^[A-Z]+$" 　　 // By 26 A string consisting of uppercase English letters  
  "^[a-z]+$" 　　 // By 26 A string consisting of lowercase English letters  
  "^[A-Za-z0-9]+$" 　　 // By numbers and 26 A string consisting of three English letters  
  "^\w+$" 　　 // By numbers, 26 A string consisting of English letters or underscores  
  "^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$"  　　  　　  //email Address  
  "^[a-zA-z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\S*)?$" 　　 //url 
  /^(d{2}|d{4})-((0([1-9]{1}))|(1[1|2]))-(([0-2]([1-9]{1}))|(3[0|1]))$/  //  Year - Month - Day  
  /^((0([1-9]{1}))|(1[1|2]))/(([0-2]([1-9]{1}))|(3[0|1]))/(d{2}|d{4})$/  //  Month / Day / Year  
  "^([w-.]+)@(([[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.)|(([w-]+.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(]?)$"  //Emil 
  /^((\+?[0-9]{2,4}\-[0-9]{3,4}\-)|([0-9]{3,4}\-))?([0-9]{7,8})(\-[0-9]+)?$/   // Telephone number  
  "^(d{1,2}|1dd|2[0-4]d|25[0-5]).(d{1,2}|1dd|2[0-4]d|25[0-5]).(d{1,2}|1dd|2[0-4]d|25[0-5]).(d{1,2}|1dd|2[0-4]d|25[0-5])$"  //IP Address  




   Regular expressions that match Chinese characters:  [\u4e00-\u9fa5] 
   Matching double-byte characters ( Including Chinese characters ) : [^\x00-\xff] 
   A regular expression that matches a blank line: \n[\s| ]*\r 
   Matching HTML The regular expression of the tag: /<(.*)>.*<\/\1>|<(.*) \/>/ 
   A regular expression that matches the first and last spaces: (^\s*)|(\s*$) 
   Matching Email Regular expression for address: \w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)* 
   Match URL URL Regular expression of: ^[a-zA-z]+://(\\w+(-\\w+)*)(\\.(\\w+(-\\w+)*))*(\\?\\S*)?$ 
   Is the matching account legal ( Beginning with letters, allowing 5-16 Bytes, allowing alphanumeric underscores ) : ^[a-zA-Z][a-zA-Z0-9_]{4,15}$ 
   Match domestic telephone number: (\d{3}-|\d{4}-)?(\d{8}|\d{7})? 
   Matching Tencent QQ No.: ^[1-9]*[1-9][0-9]*$


Metacharacters and their behavior in the context of regular expressions: 


  
  \ 将下1个字符标记为1个特殊字符、或1个原义字符、或1个后向引用、或1个8进制转义符。 
  ^ 匹配输入字符串的开始位置。如果设置了 RegExp 对象的Multiline 属性，^ 也匹配 '\n' 或 '\r' 之后的位置。 
  $ 匹配输入字符串的结束位置。如果设置了 RegExp 对象的Multiline 属性，$ 也匹配 '\n' 或 '\r' 之前的位置。 
  * 匹配前面的子表达式零次或多次。 
  + 匹配前面的子表达式1次或多次。+ 等价于 {1,}。 
  ? 匹配前面的子表达式零次或1次。? 等价于 {0,1}。 
  {n} n 是1个非负整数，匹配确定的n 次。 
  {n,} n 是1个非负整数，至少匹配n 次。 
  {n,m} m 和 n 均为非负整数，其中n <= m。最少匹配 n 次且最多匹配 m 次。在逗号和两个数之间不能有空格。 
  ? 当该字符紧跟在任何1个其他限制符 (*, +, ?, {n}, {n,}, {n,m}) 后面时，匹配模式是非贪婪的。非贪婪模式尽可能少的匹配所搜索的字符串，而默认的贪婪模式则尽可能多的匹配所搜索的字符串。 
  . 匹配除 "\n" 之外的任何单个字符。要匹配包括 '\n' 在内的任何字符，请使用象 '[.\n]' 的模式。 
  (pattern) 匹配pattern 并获取这1匹配。 
  (?:pattern) 匹配pattern 但不获取匹配结果，也就是说这是1个非获取匹配，不进行存储供以后使用。 
  (?=pattern) 正向预查，在任何匹配 pattern 的字符串开始处匹配查找字符串。这是1个非获取匹配，也就是说，该匹配不需要获取供以后使用。 
  (?!pattern) 负向预查，与(?=pattern)作用相反 
  x|y 匹配 x 或 y。 
  [xyz] 字符集合。 
  [^xyz] 负值字符集合。 
  [a-z] 字符范围，匹配指定范围内的任意字符。 
  [^a-z] 负值字符范围，匹配任何不在指定范围内的任意字符。 
  \b 匹配1个单词边界，也就是指单词和空格间的位置。 
  \B 匹配非单词边界。 
  \cx 匹配由x指明的控制字符。 
  \d 匹配1个数字字符。等价于 [0-9]。 
  \D 匹配1个非数字字符。等价于 [^0-9]。 
  \f 匹配1个换页符。等价于 \x0c 和 \cL。 
  \n 匹配1个换行符。等价于 \x0a 和 \cJ。 
  \r 匹配1个回车符。等价于 \x0d 和 \cM。 
  \s 匹配任何空白字符，包括空格、制表符、换页符等等。等价于[ \f\n\r\t\v]。 
  \S 匹配任何非空白字符。等价于 [^ \f\n\r\t\v]。 
  \t 匹配1个制表符。等价于 \x09 和 \cI。 
  \v 匹配1个垂直制表符。等价于 \x0b 和 \cK。 
  \w 匹配包括下划线的任何单词字符。等价于'[A-Za-z0-9_]'。 
  \W 匹配任何非单词字符。等价于 '[^A-Za-z0-9_]'。 
  \xn 匹配 n，其中 n 为106进制转义值。106进制转义值必须为确定的两个数字长。 
  \num 匹配 num，其中num是1个正整数。对所获取的匹配的引用。 
  \n 标识1个8进制转义值或1个后向引用。如果 \n 之前至少 n 个获取的子表达式，则 n 为后向引用。否则，如果 n 为8进制数字 (0-7)，则 n 为1个8进制转义值。 
  \nm 标识1个8进制转义值或1个后向引用。如果 \nm 之前至少有is preceded by at least nm 个获取得子表达式，则 nm 为后向引用。如果 \nm 之前至少有 n 个获取，则 n 为1个后跟文字 m 的后向引用。如果前面的条件都不满足，若 n 和 m 均为8进制数字 (0-7)，则 \nm 将匹配8进制转义值 nm。 
  \nml 如果 n 为8进制数字 (0-3)，且 m 和 l 均为8进制数字 (0-7)，则匹配8进制转义值 nml。 
  \un 匹配 n，其中 n 是1个用4个106进制数字表示的Unicode字符。 



  Regular expressions that match Chinese characters:  [u4e00-u9fa5] 
   Matching double-byte characters ( Including Chinese characters ) : [^x00-xff] 
   A regular expression that matches a blank line: n[s| ]*r 
   Matching HTML The regular expression of the tag: /<(.*)>.*</1>|<(.*) />/ 
   A regular expression that matches the first and last spaces: (^s*)|(s*$) 
   Matching Email Regular expression for address: w+([-+.]w+)*@w+([-.]w+)*.w+([-.]w+)* 
   Match URL URL Regular expression of: http://([w-]+.)+[w-]+(/[w- ./?%&=]*)? 
   Use regular expressions to restrict text box input in Web page forms:  
   Restrict Chinese input with regular expressions: onkeyup="value=value.replace(/[^u4E00-u9FA5]/g,'')" onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^u4E00-u9FA5]/g,''))" 
   Restrict the entry of full-width characters with regular expressions:  onkeyup="value=value.replace(/[^uFF00-uFFFF]/g,'')" onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^uFF00-uFFFF]/g,''))" 
   Restrict the entry of only numbers with regular expressions: onkeyup="value=value.replace(/[^d]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^d]/g,''))" 
   Restrict the input of numbers and English only with regular expressions: onkeyup="value=value.replace(/[W]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^d]/g,''))"


= = = = = = = = = = = Common regular formula 


 Regular expressions that match Chinese characters:  [\u4e00-\u9fa5] 
   Matching double-byte characters ( Including Chinese characters ) : [^\x00-\xff] 
   A regular expression that matches a blank line: \n[\s| ]*\r 
   Matching HTML The regular expression of the tag: /<(.*)>.*<\/\1>|<(.*) \/>/ 
   A regular expression that matches the first and last spaces: (^\s*)|(\s*$) 
   Matching IP Regular expression for address: /(\d+)\.(\d+)\.(\d+)\.(\d+)/g // 
   Matching Email Regular expression for address: \w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)* 
   Match URL URL Regular expression of: http://(/[\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)? 
  sql Statement: ^(select|drop|delete|create|update|insert).*$ 




 Non-negative integer: ^\d+$ 
 Positive integer: ^[0-9]*[1-9][0-9]*$ 
 Non-positive integer: ^((-\d+)|(0+))$ 
 Negative integer: ^-[0-9]*[1-9][0-9]*$ 
 Integer: ^-?\d+$ 
 Non-negative floating-point numbers: ^\d+(\.\d+)?$ 
 Positive floating point number: ^((0-9)+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$ 
 Non-positive floating point numbers: ^((-\d+\.\d+)?)|(0+(\.0+)?))$ 
 Negative floating point number: ^(-(( Positive floating point number regular formula )))$ 
 English string: ^[A-Za-z]+$ 
 English capital string: ^[A-Z]+$ 
 English lowercase string: ^[a-z]+$ 
 English character numeric string: ^[A-Za-z0-9]+$ 
 English numerals with underlined strings: ^\w+$ 
E-mail Address: ^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$ 
URL : ^[a-zA-Z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\s*)?$ 
 Or: ^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"\"])*$ 
 Postal code: ^[1-9]\d{5}$ 
 Chinese: ^[\u0391-\uFFE5]+$ 
 Telephone number: ^((\(\d{2,3}\))|(\d{3}\-))?(\(0\d{2,3}\)|0\d{2,3}-)?[1-9]\d{6,7}(\-\d{1,4})?$ 
 Mobile phone number: ^((\(\d{2,3}\))|(\d{3}\-))?13\d{9}$ 
 Double byte character ( Including Chinese characters ) : ^\x00-\xff 
 Match the first and last spaces: (^\s*)|(\s*$) (Like vbscript That way trim Function)  
 Matching HTML Mark: <(.*)>.*<\/\1>|<(.*) \/> 
 Matching blank lines: \n[\s| ]*\r 
 Extract network links from information: (h|H)(r|R)(e|E)(f|F) *= *('|")?(\w|\\|\/|\.)+('|"| *|>)? 
 Extract the email address in the message: \w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)* 
 Picture links in extracted information: (s|S)(r|R)(c|C) *= *('|")?(\w|\\|\/|\.)+('|"| *|>)? 
 Extract the IP Address: (\d+)\.(\d+)\.(\d+)\.(\d+) 
 Extract the Chinese mobile phone number from the information: (86)*0*13\d{9} 
 China fixed telephone number in extracted information: (\(\d{3,4}\)|\d{3,4}-|\s)?\d{8} 
 Extract Chinese telephone numbers (including mobile and fixed telephones) from information: (\(\d{3,4}\)|\d{3,4}-|\s)?\d{7,14} 
 China Postal Code in Extract Information: [1-9]{1}(\d+){5} 
 Extract floating point numbers (that is, decimals) from information: (-?\d*)\.?\d+ 
 Extract any number in the information   : (-?\d*)(\.\d+)? 
IP : (\d+)\.(\d+)\.(\d+)\.(\d+) 
 Telephone area code: /^0\d{2,3}$/ 
 Tencent QQ No.: ^[1-9]*[1-9][0-9]*$ 
 Account number ( Beginning with letters, allowing 5-16 Bytes, allowing alphanumeric underscores ) : ^[a-zA-Z][a-zA-Z0-9_]{4,15}$ 
 Chinese, English, figures and underscores: ^[\u4e00-\u9fa5_a-zA-Z0-9]+$

Related articles: