我想用正则表达式验证时间。我创建了以下表达式:
'#^([01][0-9])|(2[0-4])(:[0-5][0-9]){1,2}$#'
这是问题所在:
<?php
var_dump(preg_match('#^([01][0-9])|(2[0-4])(:[0-5][0-9]){1,2}$#', '14:25'));
// Returns 1 (OK)
var_dump(preg_match('#^([01][0-9])|(2[0-4])(:[0-5][0-9]){1,2}$#', '25:25'));
// Returns 0 (OK)
var_dump(preg_match('#^([01][0-9])|(2[0-4])(:[0-5][0-9]){1,2}$#', '14:2555'));
// Returns 1 (instead of 0 as I would like to get)
?>
有人知道错在哪里吗?
最佳答案
时间为24小时正则表达式模式:
([01]?[0-9]|2[0-3]):[0-5][0-9](:[0-5][0-9])?
24小时制是从0-23或00-23开始,然后是半冒号(:),然后是00-59,然后是(可选地是半冒号(:),然后是00-59)。
描述 :
( # start of group #1
[01]?[0-9] # start with 0-9,1-9,00-09,10-19
| # or
2[0-3] # start with 20-23
) # end of group #1
: # follow by a semi colon (:)
[0-5][0-9] # follow by 0..5 and 0..9, which means 00 to 59
( # start of group #2
: # follow by a semi colon (:)
[0-5][0-9] # follow by 0..5 and 0..9, which means 00 to 59
) # end of group #2
? # optional third part
匹配时间格式:
01:00, 02:00, 13:00,
1:00, 2:00, 13:01,
23:59, 15:00,
00:00, 0:00,
14:34:43, 01:00:00
时间格式不匹配:
24:00 # hour is out of range [0-23]
12:60 # minute is out of range [00-59]
0:0 # invalid format for minute, at least 2 digits
13:1 # invalid format for minute, at least 2 digits
0:00:0 # invalid format for seconds, at least 2 digits
101:00 # hour is out of range [0-23]
例子 :
var_dump(preg_match('#^[01]?[0-9]|2[0-3]):[0-5][0-9](:[0-5][0-9])?$#', '14:25')); // OK
var_dump(preg_match('#^[01]?[0-9]|2[0-3]):[0-5][0-9](:[0-5][0-9])?$#', '25:25')); // KO
var_dump(preg_match('#^[01]?[0-9]|2[0-3]):[0-5][0-9](:[0-5][0-9])?$#', '25:30')); // KO
var_dump(preg_match('#^[01]?[0-9]|2[0-3]):[0-5][0-9](:[0-5][0-9])?$#', '14:2555')); // KO
var_dump(preg_match('#^[01]?[0-9]|2[0-3]):[0-5][0-9](:[0-5][0-9])?$#', '14:65')); // KO
var_dump(preg_match('#^[01]?[0-9]|2[0-3]):[0-5][0-9](:[0-5][0-9])?$#', '14:59')); // OK
var_dump(preg_match('#^[01]?[0-9]|2[0-3]):[0-5][0-9](:[0-5][0-9])?$#', '14:34:43')); // OK