CODEWITHSUNDEEP
phpregex
Razorphyn
Razorphyn

Reputation: 1332

Allow only one space between letters

I don't know almost anything about regex, but I need to allow only one space between letters, this is what I have done with another questiona and answer, plus random tries with regex101:

/^(\d){1,}(\:[A-Za-z0-9-]+([ a-zA-Z0-9-]+)?)?\:(\d){1,}(?:\.(\d){1,2})?$/m

The fomat should be:

[integer]:[optional label :][integer/decimal]

Example:

12:aaa:12.31
56:a s f:15
34:45.8

I have done some random tries without any success,I'm only able to allow infinite space, could someone help me? I have also looked at others answers, but I couldn't implement in my regex.

Check if error:

    preg_match_all('/^(\d+)(:[A-Z0-9-]+(?: [A-Z0-9-]+)*)?:(\d+(?:\.\d{1,2})?)$/mi', $_POST['ratetable'], $out);
    if($out[0]!=explode("\n",$_POST['ratetable'])){
        header('Content-Type: application/json; charset=utf-8');
        echo json_encode(array(0=>'Invalid price table at line: '.implode(", ", array_diff_key(array_flip(explode("\n",$_POST['ratetable'])),array_flip($out[0])))));
        exit();
    }

Upvotes: 1

Views: 749

Answers (5)

revo
revo

Reputation: 48721

^\d+:([\w\d]+ ?)*:?\d+(\.\d+)?$

Live demo

Upvotes: 0

Rudie
Rudie

Reputation: 53831

I think

^\d+:([^:]+:)?\d+(\.\d+)?$

might do it...

It means: <int> + ":" + [label + ":"] + <float> where label can be anything but :.

Upvotes: 2

sergio
sergio

Reputation: 5260

You can use preg_match 

$str = 'Another Example String 1_2-3';
echo $str . "<br />\n";
if (preg_match('#^(?:[\w-]+ ?)+$#', $str)){
    echo 'Legal format!';
} else {
    echo 'Illegal format!';
}

Upvotes: 1

Jerry
Jerry

Reputation: 71548

You could make the regex a bit shorter and allow a single space in between each letter like this:

/^(\d+)(:[A-Z0-9-]+(?: [A-Z0-9-]+)*)?:(\d+(?:\.\d{1,2})?)$/gmi

regex101 demo

If you want to capture only the label (and exclude the :) in the capture, you can use this one.

Upvotes: 2

Denis de Bernardy
Denis de Bernardy

Reputation: 78463

You're nearly there:

(?: [a-zA-Z0-9-]+)*

the above would mean: space followed by at least one in the character group; the latter group any number of times, without capturing

Upvotes: 1

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