CODEWITHSUNDEEP
phpregex
leemon
leemon

Reputation: 1061

Regular expression for matching a key:value pair

I'm using the following regular expression in PHP for matching a key:value pair, where key is a word and value is a positive float number:

preg_match('/^(\w+):(?!0\d)\d*(\.\d+)?/i', $string, $match);

If I input a string such as:

Europe:6

print_r($match)

Returns:

Array ( [0] => Europe:6 [1] => Europe )

Omitting the value part.

Any ideas about what I'm doing wrong?

Thanks in advance.

Upvotes: 0

Views: 102

Answers (3)

Jaykumar Patel
Jaykumar Patel

Reputation: 27614

Check this demo jsFiddle

PHP

<?php
$string = "europe:6";
preg_match('/^(\w+):(?!0\d)(\d*)?/i', $string, $match);
print_r($match);
?>

Output

Array ( [0] => europe:6 [1] => europe [2] => 6 )

Here i test and modify your Regular Expression

Hope this help you!

Upvotes: 0

Ryan J
Ryan J

Reputation: 8323

If you're trying to capture a value that is a positive floating point paired with some key, I would suggest you try this instead:

preg_match('/^(\w+):([\.\d]+)/i', $string, $match);

Upvotes: 2

Amit Joki
Amit Joki

Reputation: 59252

Use this regex:

(\w+)=([0-9]+(?:\.[0-9]*)?)

Group 1 will contain key, while Group 2 will contain the value.

Upvotes: 0

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