PregFind: Difference between revisions

Latest revision as of 17:11, 7 November 2024

This function stops at the first occurrence of the pattern in the input string and returns the result of the search.

[[\|link=\|]]	Warning: When declaring a pattern string in quotes, the backslash character should be doubled up. e.g. "\\(" will match a single bracket.

[[\|link=\|]]	Warning: Multiline flag does not work correctly

Syntax

bool pregFind ( string subject, string pattern [, int/string flags ] )

Required Arguments

subject: The input string
pattern: The pattern string to search for in the input string.

Optional Arguments

flags: Conjuncted value that contains flags ( 1 - ignorecase, 2 - multiline, 4 - dotall, 8 - extended, 16 - unicode ) or ( i - Ignore case, m - Multiline, d - Dotall, e - Extended, u - Unicode )

Returns

Returns true if the pattern was found in the input string, false otherwise.

Example

Click to collapse [-]

Shared ( client and server )

Some examples:

addCommandHandler( 'examples',
	function( )
                -- find the first occurrence of 'hello world' in a string
		outputDebugString( pregFind( 'hello world, hello world, hello world', 'hello world' ) and 'found' or 'not found' ) -- found 
                -- find the first occurrence of an integer in a string
                outputDebugString( pregFind( '123', '^-{0,1}\\d+$' ) and 'found' or 'not found' ) -- found
                -- check if the input string consists of at least 3 letters from a to z (both uppercase and lowercase) and does not contain any whitespace characters
                outputDebugString( pregFind( 'Kenix', '^[a-zA-Z]{3,}$' ) and 'found' or 'not found' ) -- found
                -- check if the input string matches the format of a role-play name
                outputDebugString( pregFind( 'Garry_Newman', '([A-Z]{1,1})[a-z]{2,9}_([A-Z]{1,1})[a-z]{2,9}' ) and 'found' or 'not found' ) -- found
                -- example of a search for non-ASCII characters (i.e. cyrillic) - привет
                outputDebugString( pregFind( 'Всем привет парни, ещё раз привет :D', 'привет' ) and 'found' or 'not found' ) -- found
                -- example of a search for a specific sequence of numbers
                outputDebugString( pregFind( '5, 10', '^([1-9]{1}[0-9]{0,})+(((,\s|,)[1-9]{1}[0-9]{0,}){0,1}){1,1}' ) and 'found' or 'not found' ) -- found

                
	end
)

Changelog

Version	Description

1.5.0-9.07315

Added flag "u" in regular expressions

@@ Line 1: / Line 1: @@
 __NOTOC__
 {{Server client function}}
-This function find only one match and when match is founded stop working and return a result.
+{{New items|3.0135|1.3.5|
+This function stops at the first occurrence of the pattern in the input string and returns the result of the search.
+}}
+{{Warning|When declaring a pattern string in quotes, the backslash character should be doubled up. e.g. "\\(" will match a single bracket.}}
+{{Warning|Multiline flag does not work correctly}}
 ==Syntax==
 <syntaxhighlight lang="lua">
-bool pregFind ( string base, string pattern )
+bool pregFind ( string subject, string pattern [, int/string flags ] )
 </syntaxhighlight>
 ===Required Arguments===
-*'''base:''' The base [[string]] for find match.
+*'''subject:''' The input [[string]]
-*'''pattern:''' The pattern for find in base string.
+*'''pattern:''' The pattern [[string]] to search for in the input [[string]].
+===Optional Arguments===
+*'''flags:''' Conjuncted value that contains flags ( 1 - ignorecase, 2 - multiline, 4 - dotall, 8 - extended, 16 - unicode ) or ( i - Ignore case, m - Multiline, d - Dotall, e - Extended, u - Unicode )
 ===Returns===
-Returns an ''[[bool]]'' if the function was successful found one match, ''false'' otherwise.
+Returns ''true'' if the pattern was found in the input string, ''false'' otherwise.
 ==Example==
@@ Line 22: / Line 28: @@
 addCommandHandler( 'examples',
 	function( )
-                 -- hello word find
+                 -- find the first occurrence of 'hello world' in a string
 		outputDebugString( pregFind( 'hello world, hello world, hello world', 'hello world' ) and 'found' or 'not found' ) -- found
-                 -- integer number find
+                 -- find the first occurrence of an integer in a string
                  outputDebugString( pregFind( '123', '^-{0,1}\\d+$' ) and 'found' or 'not found' ) -- found
-                 -- Login with a-z and A-Z symbols and have more 3 symbols
+                 -- check if the input string consists of at least 3 letters from a to z (both uppercase and lowercase) and does not contain any whitespace characters
-                 outputDebugString( pregFind( 'Kenix', '[a-zA-Z]{3,}' ) and 'found' or 'not found' ) -- found
+                 outputDebugString( pregFind( 'Kenix', '^[a-zA-Z]{3,}$' ) and 'found' or 'not found' ) -- found
-                 -- Russian hello ( привет ) find
+                -- check if the input string matches the format of a role-play name
-                 outputDebugString( pregFind( 'привет привет', 'привет' ) and 'found' or 'not found' ) -- found
+                outputDebugString( pregFind( 'Garry_Newman', '([A-Z]{1,1})[a-z]{2,9}_([A-Z]{1,1})[a-z]{2,9}' ) and 'found' or 'not found' ) -- found
-                 -- Sequence of numbers
+                 -- example of a search for non-ASCII characters (i.e. cyrillic) - привет
+                 outputDebugString( pregFind( 'Всем привет парни, ещё раз привет :D', 'привет' ) and 'found' or 'not found' ) -- found
+                 -- example of a search for a specific sequence of numbers
                  outputDebugString( pregFind( '5, 10', '^([1-9]{1}[0-9]{0,})+(((,\s|,)[1-9]{1}[0-9]{0,}){0,1}){1,1}' ) and 'found' or 'not found' ) -- found
 	end
 )
 </syntaxhighlight>
 </section>
+==Changelog==
+{{ChangelogHeader}}
+{{ChangelogItem|1.5.0-9.07315|Added flag "u" in regular expressions}}
 ==See Also==
 {{Utility_functions}}