Online PHP editor | output for dZi4e

@ 2014-04-23T17:38:26Z

<?php
$a = [
	'sss4444dfdf', //лишние
    '444444', //много
    'sdfsdf', //все не то
    '', //
    '4', //мало
];
$i = 0;
print_r(preg_filter('/^\D*(\d{2,4}).*$/', '$1', $a[$i++]));
print_r(preg_filter('/^\D*(\d{2,4}).*$/', '$1', $a[$i++]));
print_r(preg_filter('/^\D*(\d{2,4}).*$/', '$1', $a[$i++]));
print_r(preg_filter('/^\D*(\d{2,4}).*$/', '$1', $a[$i++]));
print_r(preg_filter('/^\D*(\d{2,4}).*$/', '$1', $a[$i++]));

Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: 44444444
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29: Parse error: syntax error, unexpected '[' in /in/dZi4e on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5: Parse error: parse error, unexpected '[' in /in/dZi4e on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error in /in/dZi4e on line 2
Process exited with code 255.

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