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run code in 150+ php & hhvm versions
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<?php function koapToNum($koap){ $o = array('/[^\d\.]/','\.\.'); $n = array('','.'); $digit = preg_replace($o, $n, $koap); return $digit; } echo koapToNum('12.21.1 ч.1.1');
Output for 5.3.28 - 5.3.29, 5.4.20 - 7.1.0
Warning: preg_replace(): Delimiter must not be alphanumeric or backslash in /in/o1l4K on line 5
Output for 5.2.5 - 5.3.27, 5.4.0 - 5.4.19
Warning: preg_replace(): Delimiter must not be alphanumeric or backslash in /in/BiEYu on line 5
Output for 4.3.11 - 5.2.4
Warning: preg_replace(): Delimiter must not be alphanumeric or backslash in /in/BiEYu on line 5 12.21.1.1.1
Output for 4.3.1 - 4.3.10
Warning: Delimiter must not be alphanumeric or backslash in /in/BiEYu on line 5 12.21.1.1.1
Output for 4.3.0
Warning: Delimiter must not be alphanumeric or backslash in /in/o1l4K on line 5 12.21.1.1.1