[SOLVED] How does this work?

[kts]

I was recently advised and helped with a code to remove the last #'s on an id. ex: 21_75_39 -> 21_75

 

the code i was presented was:

preg_replace('#_[\d]+$#', '', "21_75_8484");

 

I was wondering if someone can simply explain how it works, im not familiar with preg_replace, but i love how it worked

 

Thanks.

[effigy]

# -- Starting delimiter

_ -- Literal underscore

[\d]+ -- One or more digits; this can be reduced to \d+

$ -- End of line anchor

# -- Ending delimiter

[kts]

Thank you sir, this has inspired me to learn more on regex, but you cleared up the "mystery" for me thanks again!

[laffin]

Use what I use Expresso Regex Developement tool

 

even if ya dun understand regex completely, this tool helps a lot

[kts]

interesting, ill check out the tool... i would probobly rather just learn the syntax, but it may help

[laffin]

believe me it does help out a lot