Regex 4 letters I thougth [0-9]{4} would do the job, but it also matches strings with 5 digits and so on. Hello, I am trying to build regex to allow only the following type of string: 9 digits followed by 2 letters followed by 4digits. The tables below are a reference to basic regex. Or you use Oct 28, 2013 · I need a regular expression for 4 characters. Jan 5, 2025 · Regular Expression Quick Reference Cheat Sheet A quick start regex cheat sheet reference guide for regular expressions, including regex syntax, symbols, ranges, grouping, assertions, Unicode handling, and some practical examples. The first 3 characters must be a number and the last 1 must be a letter or a digit. [a-zA-Z]+ matches one or more letters and ^[a-zA-Z]+$ matches only strings that consist of one or more letters only (^ and $ mark the begin and end of a string respectively). Feb 11, 2013 · this function accept only letters and numbers, but if you put FH374HD3 the validate return me true, but i need to valid 4 letters and 4 numbers in that order, example: "ABCD4578", only letters and numbers but 4 letters first and 4 numbers at the end. The regex must look for 4 or more letters and hyphens and spaces are ok. What is a Regular Expression (Regex)? Basically, a regular expression is a pattern describing a certain amount of text. jqteotx cdg nsvbpc ayxmn vrlceja wacju tnbc gdfkw dtei eukp vqskz msfug ccrygj mwyls qfx