[SOLVED] PCRE Regular expression match but ignore string in between

[Kyan]

so using .* would only match the last one? (I thought that quantifier matches 0 or more times)

[jchd]

It greedily matches as much as possible (i.e. almost everything) but backtracks so that the rest of the regexp matches (if possible). That uses some cycles but not a big problem with our CPUs, unless you feed very long input (and even then...).

What hapened when you tried it?

[Kyan]

 

Expected Match: ISO/IEC 11770-2:2008/Cor.1:2009(E)
Expected Output: ISO/IEC 11770-2:2009(E)

#1 GlobalMatch Mode: (?i)((?:bs )?(?:en )?(?:np )?(?:is[o0]|DIN)\V{1,10}[-\d]+)(.+:)?(\d{4}(?:\(\w\))?)
output:

Spoiler

Row|Col 0
[0]|ISO/IEC 11770-
[1]|2:
[2]|2008
[3]|ISO/IEC 11770-
[4]|2:
[5]|2008
[6]|ISO/IEC 1
[7]|
[8]|1770
[9]|ISO/IEC 11770-2
[10]|:2008/Cor.1:
[11]|2009(E)

PHPMatchMode:
Row|Col 0
[0]|ISO/IEC 11770-2:2008
[1]|ISO/IEC 11770-
[2]|2:
[3]|2008

On [3] should have been: 2009(E)

#2 On global match (3), greedy match: (?i)((?:bs )?(?:en )?(?:np )?(?:is[o0]|DIN)\V{1,10}[-\d]+)(.*:)?(\d{4}(?:\(\w\))?)

Spoiler

Row|Col 0
[0]|ISO/IEC 11770-2
[1]|:
[2]|2008
[3]|ISO/IEC 11770-2
[4]|:
[5]|2008
[6]|ISO/IEC 1
[7]|
[8]|1770
[9]|ISO/IEC 11770-2
[10]|:2008/Cor.1:
[11]|2009(E)

Same regexp PHP match (2):

Row|Col 0
[0]|ISO/IEC 11770-2:2008
[1]|ISO/IEC 11770-2
[2]|:
[3]|2008

The thing is that it never outputs the same number of rows. The only possibility I see is to use to output: $a[ubound($a)-3]&$a[ubound($a)-1] to always output the "Expected Output".

#1 and #2 end up with the same matches (using in the first the "+" and in the last "*")

 

The things change when I only use "*": (?i)((?:bs )?(?:en )?(?:np )?(?:is[o0]|DIN)\V{1,10}[-\d]*)(.*:)?(\d{4}(?:\(\w\))?)

Global Matches (3):

Spoiler

Row|Col 0
[0]|ISO/IEC 11770-2
[1]|:
[2]|2008
[3]|ISO/IEC 11770-2
[4]|:
[5]|2008
[6]|ISO/IEC 1
[7]|
[8]|1770
[9]|ISO/IEC 
[10]|
[11]|8825
[12]|ISO/IEC 
[13]|
[14]|2009
[15]|ISO/IEC 11770-2
[16]|:2008/Cor.1:
[17]|2009(E)

 

PHP Match:

Spoiler

Row|Col 0
[0]|ISO/IEC 11770-2:2008
[1]|ISO/IEC 11770-2
[2]|:
[3]|2008

 

 

Edited December 10, 2016 by Kyan