PHP - preg_replace number within string

Question

I am working with a string like:

$string = "2017 MODEL YEAR 6.7L POWER STROKE V8 DIESEL 6-SPEED AUTO TRANS 3.55 ELECTRONIC LOCKING AXLE FX4 OFF-ROAD PACKAGE .SKID PLATES 10000-lb. GVWR PACKAGE";

Within the string is the string 10000-lb. GVWR PACKAGE. My goal is to apply number_format to 10000 so that the string reads 10,000-lb. GVWR PACKAGE.

I have been testing with preg_replace and can get to the number using:

preg_replace('!\d+-lb\.!', '\0', $string);

I attempt to apply number_format like:

preg_replace('!\d+-lb\.!', number_format('\0'), $string);

but receive the following error:

number_format() expects parameter 1 to be float, string given

Applying intval() to the match returns a 0 and not the expected 10,000.

I am not sure how to proceed. The catch I have also identified is that I do not want number formatting applied to the first 2017. Do I need to adjust the preg_match to not be as specific or perhaps apply a preg_match to the match within the first preg_match to get the number only?

Odd that floatval returns the way it does. What kind of variations are there on "10000" can it be "8000"? — Andreas
– Andreas, Commented Sep 12, 2017 at 17:51
You can use this answer: Php format numebrs in a string with regexp — ctwheels
– ctwheels, Commented Sep 12, 2017 at 17:56

Andreas · Accepted Answer · 2017-09-12 18:00:51Z

3

One way to go around it is to match two separate \d's.
First one is one or more digits, second one is exactly three digits.

Then I use str_replace to replace the number in the string.

$string = "2017 MODEL YEAR 6.7L POWER STROKE V8 DIESEL 6-SPEED AUTO TRANS 3.55 ELECTRONIC LOCKING AXLE FX4 OFF-ROAD PACKAGE .SKID PLATES 10000-lb. GVWR PACKAGE";

Preg_match("/(\d+)(\d{3})-lb/", $string, $match);

$find = $match[0];
$replace = $match[1] .",". $match[2] ."-lb";

Echo str_replace($find, $replace, $string);

https://3v4l.org/HvAjg
This will work for numbers 1000+, if you need numbers below 1000 then it needs some tweaks. Just tell me and I will fix it.

answered Sep 12, 2017 at 18:00

Andreas

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