Find float number in string with php

Question

I have these strings:

$txt1 = "8,742 MW";
$txt2 = "7,750 KW";
$txt2 = "2,350 GW";

I need a regex to find the valid float number into these strings... How can I do it ? Thanks.

Related: PHP String to Float

mickmackusa
– mickmackusa ♦

2025-01-19 06:22:03 +00:00
Commented Jan 19 at 6:22 — mickmackusa
– mickmackusa ♦, Commented Jan 19 at 6:22

hsz · Accepted Answer · 2011-11-02 09:22:27Z

1

To match float value try following regexp:

(\d+(?:,\d+)?)

Also you can just cast it to a float using:

$floatVal = (float) "8,742 MW";

answered Nov 2, 2011 at 9:22

hsz

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2 Comments

mike jones Over a year ago

if (preg_match("(\d+(?:,\d+)?)", $txt1, $matches)) { $value = $matches[0]; print "value=$value\n"; }

Bao Over a year ago

$floatVal = (float) "8,742 MW"; // It will work if you replace the ',' by '.'

Axel Isouard · Accepted Answer · 2011-11-02 09:24:09Z

1

This one should do it :

[-+]?([0-9]*\,)?[0-9]+

Or if you'd like to convert directly to a float by taking the comma "," as a dot ".", then I think you should set your locale to a french one as stated here :

setLocale(LC_ALL, 'fr_BE.UTF-8');

answered Nov 2, 2011 at 9:24

Axel Isouard

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