How to write this regular expression? Expert help-php Tutorial

How to write this regular expression? Experts Help reply to the discussion (solution)

$ Str = "[size = 18 px] 123 [size = 16px] 456 [/size] 789 [/size]";

Preg_match_all ('# \ [size = [^ \ [\] + \] (? : [^ \ [\] + | ((? R) * \ [/size \] # ', $ str, $ matchs );

Print_r ($ matchs );

$ Str = "[size = 18 px] 123 [size = 16px] 456 [/size] 789 [/size]";

Preg_match_all ('# \ [size = [^ \ [\] + \] (? : [^ \ [\] + | ((? R) * \ [/size \] # ', $ str, $ matchs );

Print_r ($ matchs );

Great God !!! Too Good. it takes some time to digest it.

$ Str = "[size = 18 px] 123 [size = 16px] 456 [/size] 789 [/size]";

Preg_match_all ('# \ [size = [^ \ [\] + \] (? : [^ \ [\] + | ((? R) * \ [/size \] # ', $ str, $ matchs );

Print_r ($ matchs );

Great God !!! Too Good. it takes some time to digest it.

$ Str = "[size = 18 px] 123 [size = 16px] 456 [/size] 789 [/size]";

Preg_match_all ('# \ [size = [^ \ [\] + \] (? : [^ \ [\] + | ((? R) * \ [/size \] # ', $ str, $ matchs );

Print_r ($ matchs );

Great God !!! Too Good. it takes some time to digest it.

Irrigation ..

Don't underestimate what I wrote. The answer is exactly what you want.

$str = "123[size=16px]456789[/size]";$pattern = '/\[size=18px\]123(.*?)789\[\/size\]/';preg_match_all($pattern, $str, $arr);print_r($arr);