Regex start with a word till specific word/char/space

Question

The string could be as following line by line every time.

code=876 and town=87 and geocode in(1,2,3)
code=876 and town=878 and geocode in(1,2,3)
code=876 and town="878" and geocode in(1,2,3)
code=876 and town=8,43 and geocode in(1,2,3)
code=876 and town='8,43' and geocode in(1,2,3)
code=876 and town=-1 and geocode in(1,2,3)
code=876 and town=N/A and geocode in(1,2,3)

The result should be with preg_match

town=87
town=878
town="878"
town=8,43
town='8,43'
town=-1
town=N/A

Note: I know there are various ways to achieve this task but I want to regex only. Thanks

Why do you need a regex for this? strpos and substr is pretty sufficient for this task. — maio290, Mar 11 '19 at 13:07
Yes, I know. But want to achieve this with regex, please answer the best solution. — zarpio, Mar 11 '19 at 13:09
I won't argue with you which method is the best one - but if you're having trouble writing a regex, you may consider using a method you fully understand. — maio290, Mar 11 '19 at 13:15

score 2 · Accepted Answer · answered Mar 11 '19 at 13:09

Try using preg_match_all, with the following regex pattern:

town=\S+

This says to match town= followed by any number of non whitespace characters. The matches are then made available in an output array.

$input = "code=876 and town=87 and geocode in(1,2,3)";
$input .= "code=876 and town=878 and geocode in(1,2,3)";
$input .= "code=876 and town=\"878\" and geocode in(1,2,3)";
$input .= "code=876 and town=8,43 and geocode in(1,2,3)";
$input .= "code=876 and town='8,43' and geocode in(1,2,3)";
$input .= "code=876 and town=-1 and geocode in(1,2,3)";
$input .= "code=876 and town=N/A and geocode in(1,2,3)";
preg_match_all("/town=\S+/", $input, $matches);
print_r($matches[0]);

Array
(
    [0] => town=87
    [1] => town=878
    [2] => town="878"
    [3] => town=8,43
    [4] => town='8,43'
    [5] => town=-1
    [6] => town=N/A
)

score 2 · Answer 2 · answered Mar 11 '19 at 13:10

2

Use explode and explode on space.

foreach(explode(PHP_EOL, $str) as $line){
    echo explode(" ", $line)[2];
}

Outputs:

town=87
town=878
town="878"
town=8,43
town='8,43'
town=-1
town=N/A

https://3v4l.org/MOUhm

answered Mar 11 '19 at 13:10

Andreas

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score 1 · Answer 3 · answered Mar 11 '19 at 13:11

1

Use explode() function.

$str = "code=876 and town=87 and geocode in(1,2,3)";
echo explode(" and ",$str)[1];

answered Mar 11 '19 at 13:11

nice_dev

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Regex start with a word till specific word/char/space

3 Answers3