preg_match: trying to identify number formats

I'm trying to identify not only "numbers" in a string, but tag what type of number it is, such as General, Fraction, Percentile, Ratio etc.

Now if I use a tool like http://rubular.com/, my patterns appear to work fine.

Rules?

([-+]?)([0-9]+)([,+]?)([.]?)       //General
([-+]?[0-9.,]+[%])                 //Percent
([0-9]+[\/][0-9]+(?:st|nd|rd|th))  //Fraction
([-+]?[0-9.,]+[:][-+]?[0-9.,]+)    //Ratio  

Strings to check?

1  
1,000  
1.000  
-50.5  
-1:+3  
1,200.6:3.9  
+2:-4  
1/5th  
25%  
25.76%  
1,001%  

It's when I put them in php (if/elseif) constructs I always end up with the "general" number?

if (preg_match('/([-+]?[0-9.,]+[%])/',$string)) {
    echo " PERCENTIL开发者_开发技巧E ";

} elseif (preg_match('/([0-9]+[\/][0-9]+(?:st|nd|rd|th))/',$string)) {
    echo " FRACTION ";

} elseif (preg_match('/([-+]?[0-9.,]+[:][-+]?[0-9.,]+)/',$string)) {
    echo " RATIO ";

} elseif (preg_match('/([-+]?)([0-9]+)([,+]?)([.]?)/',$string)) {
    echo " CARDINAL ";

} else {
    echo " GENERAL ";
}

No matter what, it echos "CARDINAL".

Yes, I've tried switching the order (Card/General first, then the others). Yes, I've tried making them independant IF()s, and in reverse order (most general first).

Nothing appears to work. Even a Single IF checking for any of the formats simply fails. Either my rules are stuffed - or I'm doing something blatantly wrong.

You error must come from somewhere else, I couldn't reproduce it. Try to put your code in an otherwise empty file to test it by itself and it should work fine.

Test.php:

$nums = array(
  '1',
  '1,000',
  '1.000',
  '-50.5',
  '-1:+3',
  '1,200.6:3.9',
  '+2:-4',
  '1/5th',
  '25%',
  '25.76%',
  '1,001%'
);
foreach ($nums as $string) {
  echo $string.': ';
  if (preg_match('/([-+]?[0-9.,]+[%])/',$string)) {
    echo " PERCENTILE ";
  } elseif (preg_match('/([0-9]+[\/][0-9]+(?:st|nd|rd|th))/',$string)) {
    echo " FRACTION ";
  } elseif (preg_match('/([-+]?[0-9.,]+[:][-+]?[0-9.,]+)/',$string)) {
    echo " RATIO ";
  } elseif (preg_match('/([-+]?)([0-9]+)([,+]?)([.]?)/',$string)) {
    echo " CARDINAL ";
  } else {
    echo " GENERAL ";
  }
  echo "\n";
}

$ php test.php

1:  CARDINAL 
1,000:  CARDINAL
1.000:  CARDINAL
-50.5:  CARDINAL
-1:+3:  RATIO 
1,200.6:3.9:  RATIO
+2:-4:  RATIO 
1/5th:  FRACTION 
25%:  PERCENTILE
25.76%:  PERCENTILE 
1,001%:  PERCENTILE

Try surrounding each regular expression with ^ and $ so that it matches only if it matches the entire string or line. Without these, if a regular expression matches part of a number, then that's still a match. For example, '1,000' matches your regular expression for CARDINAL numbers, /([-+]?)([0-9]+)([,+]?)([.]?)/, because it matches the substring '1,'. If you add ^ and $, as in /^([-+]?)([0-9]+)([,+]?)([.]?)$/, then it no longer matches.

<?php
function check_format($string) {
    if (preg_match('/^([-+]?[0-9.,]+[%])$/',$string)) {
        echo " PERCENTILE ";

    } elseif (preg_match('/^([0-9]+[\/][0-9]+(?:st|nd|rd|th))$/',$string)) {
        echo " FRACTION ";

    } elseif (preg_match('/^([-+]?[0-9.,]+[:][-+]?[0-9.,]+)$/',$string)) {
        echo " RATIO ";

    } elseif (preg_match('/^([-+]?)([0-9]+)([,+]?)([.]?)$/',$string)) {
        echo " CARDINAL ";

    } else {
        echo " GENERAL ";
    }
}

array_map("check_format", array(
    "1",
    "1,000",
    "1.000",
    "-50.5",
    "-1:+3",
    "1,200.6:3.9",
    "+2:-4",
    "1/5th",
    "25%",
    "25.76%",
    "1,001%"
    ));

outputs:

 CARDINAL  GENERAL  GENERAL  GENERAL  RATIO  RATIO  RATIO  FRACTION  PERCENTILE  PERCENTILE  PERCENTILE 

EDIT: This might be a better regular expression for CARDINAL numbers:

/^([-+]?)([0-9]+)(?:,?[0-9]{3})*([.]?)$/

Please have a look on this .

<?php 
$num = 12.20

$num = floatval(preg_replace('/[^\d.]/', '', num));

// output will be 12.2

//it always replace zero and you have number 12.00 then output will be 12
$num = 12.00

$num = floatval(preg_replace('/[^\d.]/', '', num));
// output will be 12