Can someone explain the following line of code to me ?

[jini01]

$returnValue=preg_replace("/[^0-9 \d]/i", "", $text);

 

 

I am trying for the user to be only able to input numbers. I dont understand the \d or /i

 

please someone explain that to me.

 

thanks

 

 

 

 

 

 

[Yesideez]

\d means any number between 0 and 9.

 

The /i is a flag to turn case sensitivity off so "Cat" is treated the same as "cat"

[Yesideez]

$returnValue=preg_replace("/[^0-9 \d]/i", "", $text);

 

I can't see anything being replaced there as you're not grabbing a group.

[jini01]

What do you mean by group ?

Sorry im not that proficient with preg replace

 

 

[MadTechie]

here what the code should look like

$returnValue = preg_replace('/[^\d]/', '', $text);

 

replace whats NOT (^) digits(\d) with nothing ('')

[jini01]

youre bad ass

 

 

thanks man

[Wildbug]

$returnValue=preg_replace("/[^0-9 \d]/i", "", $text);

 

Note that there is also a space (' ') in the original code.  If that's correct, and you wish to maintain that functionality, you should also include it in MadTechie's example:

 

$returnValue = preg_replace('/[^\d ]/', '', $text);

 

Then it will only keep digits and spaces.