How to check if a string contains a dot followed by a number in PHP

Question

I am trying to check if a string contains .2.

The following code works if I try to check if it contains a dot:

strpos($string, '.') !== false

But it doesn't work when use the following code:

strpos($string, '.2') !== false

nor

strpos($string, '\.2') !== false

Anyone an idea how to write it correctly? Thanks!

`strpos($string, '.2') !== false` should work as long as there is literally a `.2` in your string and no spaces between them. — putvande, Aug 11 '14 at 12:39
try this, and you will get your matches: `preg_match('/^.*(\.\d+).*$/gm', $string, $matches);` — Raphael Müller, Aug 11 '14 at 12:42

Raphael Müller · Accepted Answer · 2014-08-11T12:55:23.937

1

Ok, here is a working solution:

$string = "this text contains the specified format: .233 and some nonsense.";
preg_match('/^.*(\.\d+).*$/m', $string, $matches);

var_dump($matches);

//returns
array(2) {
  [0]=>
  string(64) "this text contains the specified format: .233 and some nonsense."
  [1]=>
  string(4) ".233"
}

see the example at: http://regex101.com/r/eF0cU7/1

edited Aug 11 '14 at 12:55

answered Aug 11 '14 at 12:49

Raphael Müller

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How to check if a string contains a dot followed by a number in PHP

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