RE: [PHP] Extracting Numbers from a string.

[David Buerer]

OK y'all, go ahead and shoot me, but this is what I'd do:

$mystring=enters $56.55 for example;
$mynumber=$mystring+1-1;

$mynumber now equals 56.55  If you want the . to go to, use the other
methods.

-Original Message-
From: Jason Caldwell [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, September 11, 2002 3:31 PM
To: [EMAIL PROTECTED]
Subject: [PHP] Extracting Numbers from a string.


I need to extract the numbers only from a field.

For example:  I have an AMOUNT field and so that I can filter out any user
typo's I would like to extract the numbers only.

If the user enters $56.55 for example or just $56 then I would like to be
able to remove the $ and the . keeping just the 56 or 5655.

Can I use eregi_replace() to do this -- I've been trying but it doesn't seem
to work right.

Thanks.
Jason



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Re: [PHP] Extracting Numbers from a string.

[Dan Ostrowski]

A simple:

eregi_replace([^0-9], , $myvar);

should do it. it says.. replace everything that is not a number ( character class 
[^0-9] which means Character class [  NOT ^ of Decimal 0-9 end character class 
] ) with a NULL string, thereby ripping out all non-numeric components and leaving 
you with a totally numeric string. ( in theory ).

I haven't tested the code so you may have to play with it, but it's pretty simple.

dan


On Wed, 11 Sep 2002 15:31:22 -0700
Jason Caldwell [EMAIL PROTECTED] wrote:

 I need to extract the numbers only from a field.
 
 For example:  I have an AMOUNT field and so that I can filter out any user
 typo's I would like to extract the numbers only.
 
 If the user enters $56.55 for example or just $56 then I would like to be
 able to remove the $ and the . keeping just the 56 or 5655.
 
 Can I use eregi_replace() to do this -- I've been trying but it doesn't seem
 to work right.
 
 Thanks.
 Jason
 
 
 
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 To unsubscribe, visit: http://www.php.net/unsub.php

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Re: [PHP] Extracting Numbers from a string.

[Zak Greant]

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Hash: SHA1

On September 11, 2002 16:31, Jason Caldwell wrote:
 I need to extract the numbers only from a field.

 For example:  I have an AMOUNT field and so that I can filter out any user
 typo's I would like to extract the numbers only.

 If the user enters $56.55 for example or just $56 then I would like to be
 able to remove the $ and the . keeping just the 56 or 5655.

 Can I use eregi_replace() to do this -- I've been trying but it doesn't
 seem to work right.

  Hey Jason,

  You can strip out all non-numeric values with this regular expression:
  $v = ereg_replace('[^0-9]', '', $v);


  If you want to keep the decimal place, then use this
  $v = ereg_replace('[^.0-9]', '', $v);


  And finally, if you want a regular expression that recognizes monetary
  values, try this :)

  $regex  = '^' # match the start of a string
. '('   # capture any text that matches the regex
. '[^0-9]*' # match any character that is not 0-9
. ')'   # stop capturing text
# Capture match so that we can see if
# they used a currency symbol :)
. '?'   # Optionally match the preceding bracketed text

. '('   # capture any text that matches the regex
. '[0-9]+'  # match an integer number
.'|[,.][0-9]{0,2}'# or match a decimal value
.'|[0-9]+[,.][0-9]{0,2}'  # match integer and decimal
.')'# Stop capturing text

.'([^0-9]+)'# Capture any trailing text (like USD or CAD)
. '?';  # Optionally match the preceding bracketed text

  if( ereg($regex, $possible_numeric_value, $captured_text) ) {
echo $possible_numeric_value might be a monetary value.;
var_dump ($captured_text);

  } else {
echo $possible_numeric_value is probably not a monetary value.;
  }


Cheers!
- --zak

Cheers!
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