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<?php
$string ="
Text-Text
Abc-123
123-Abc
A2C-def4gk
Ab-3
Abc!-ajr4
a-bc3-25aj
a?c-b%";

$regex='~
        ^\w{3,}  # at last three word characters at the beginning of the line
        -        # a dash
        \w{3,}$  # three word characters at the end of the line
        ~xm';    # multiline and freespacing mode (for this explanation)
preg_match_all($regex, $string, $matches);
print_r($matches);
?>
Success #stdin #stdout 0.02s 52432KB
comments (?)
stdin
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Standard input is empty
stdout
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Array
(
    [0] => Array
        (
            [0] => Text-Text
            [1] => Abc-123
            [2] => 123-Abc
            [3] => A2C-def4gk
        )

)
https://ideone.com/oMe3Qp
language:
PHP (php 7.3.5)
created:
10 years ago
visibility:
public

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