~^1|2|3|4|5|6|7|8|9|10|11|12\/1|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|19|20|21|22|23|24|25|26|27|28|29|30|31\/[0-9]{2}$~
Warning: Undefined variable $x in /in/5o1q9 on line 5
Deprecated: preg_match(): Passing null to parameter #1 ($pattern) of type string is deprecated in /in/5o1q9 on line 5
Warning: preg_match(): Empty regular expression in /in/5o1q9 on line 5
NULL
Output for 8.0.0 - 8.0.30
~^1|2|3|4|5|6|7|8|9|10|11|12\/1|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|19|20|21|22|23|24|25|26|27|28|29|30|31\/[0-9]{2}$~
Warning: Undefined variable $x in /in/5o1q9 on line 5
Warning: preg_match(): Empty regular expression in /in/5o1q9 on line 5
NULL
~^1|2|3|4|5|6|7|8|9|10|11|12\/1|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|19|20|21|22|23|24|25|26|27|28|29|30|31\/[0-9]{2}$~
Notice: Undefined variable: x in /in/5o1q9 on line 5
Warning: preg_match(): Empty regular expression in /in/5o1q9 on line 5
NULL
Output for 7.3.32 - 7.3.33
~^1|2|3|4|5|6|7|8|9|10|11|12\/1|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|19|20|21|22|23|24|25|26|27|28|29|30|31\/[0-9]{2}$~
Warning: preg_match(): Empty regular expression in /in/5o1q9 on line 5
NULL
Output for 5.0.4 - 5.0.5, 5.1.0 - 5.1.6
~^1|2|3|4|5|6|7|8|9|10|11|12\/1|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|19|20|21|22|23|24|25|26|27|28|29|30|31\/[0-9]{2}$~
Notice: Undefined variable: x in /in/5o1q9 on line 5
Warning: preg_match(): Empty regular expression in /in/5o1q9 on line 5
array(0) {
}
Output for 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.3
~^1|2|3|4|5|6|7|8|9|10|11|12\/1|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|19|20|21|22|23|24|25|26|27|28|29|30|31\/[0-9]{2}$~
Notice: Undefined variable: x in /in/5o1q9 on line 5
Warning: preg_match(): Empty regular expression in /in/5o1q9 on line 5
array(0) {
}
Output for 4.3.0 - 4.3.10
~^1|2|3|4|5|6|7|8|9|10|11|12\/1|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|19|20|21|22|23|24|25|26|27|28|29|30|31\/[0-9]{2}$~
Notice: Undefined variable: x in /in/5o1q9 on line 5
Warning: Empty regular expression in /in/5o1q9 on line 5
array(0) {
}