CODEWITHSUNDEEP
phpregex
Prakash Satani
Prakash Satani

Reputation: 67

preg_match for dimension

I trying to get value in 3 dimension measurement like 7.30 x 7.00 x 4.87 mm using pre_match php function.

Here is ree@([0-9\.]+) - ([0-9\.]+) mm x ([0-9\.]+) mm@

anyone can help me to find what wrong with regex.

Upvotes: 1

Views: 105

Answers (3)

le Mandarin
le Mandarin

Reputation: 192

try this code:

preg_match("#[\d]+(\.[\d]+)?\s*x\s*[\d]+(\.[\d]+)?\s*x\s*[\d]+(\.[\d]+)?\s*mm#",$variable);

a dimension value is a floating point number, ie composed of one or more digits followed by [\d]+ optionally one point and one or more digits (.[\d] +)? example: 1.45, 2,...

The whole optionally followed by one or more spaces \s* followed by an x character optionally followed by one or more spaces \s*.

In the end, we add mm chain.

Upvotes: 0

The fourth bird
The fourth bird

Reputation: 163477

I think the - should be a x and the first mm you try to match is not there so you could remove it:

([0-9\.]+) x ([0-9\.]+) x ([0-9\.]+) mm

Note that [0-9\.]+ could also match ....

If the mm is only at the end, you could also try it like this and repeat the 7.30 x pattern 2 times and match 4.87 mm at the end.

You could use a word boundary \b on the left and the right side.

\b(?:[0-9]+\.[0-9]+ x ){2}[0-9]+\.[0-9]+ mm\b

$re = '@\b(?:[0-9]+\.[0-9]+ x ){2}[0-9]+\.[0-9]+ mm\b@';
$str = 'This is a test 7.30 x 7.00 x 4.87 mm test';
if (preg_match($re, $str, $matches)) {
    echo "Match!";
}

Upvotes: 1

Bernhard
Bernhard

Reputation: 1870

You could do this more accurate and also more elegant by using preg_match_all()

preg_match_all('/\d+(?:\.\d+)?/', $input, $matches);

if(count($matches[0]) == 3){
 echo 'match!';
}

$matches[0] will output all numbers in an Array

Array
(
    [0] => Array
        (
            [0] => 2.32
            [1] => 1
            [2] => 3.455
        )

)

Upvotes: 0

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