Laravel时间24h格式正则表达式错误（无结束分隔符）

Question

So I have this:

'title' => 'required|max:100|regex:/^(?=.*[a-zA-Z]).+$/',
'start_time' => 'date_format:H:i|regex:/^((([01]?[0-9]|2[0-3]):[0-5][0-9])?)$/',

title is working perfect (the user has to enter at least 1 letter) But I'm having problems with start_time which is returning

preg_match(): No ending delimiter '/' found", exception: "ErrorException",…}

What I want is to validate 24h format with the possibility that the user ads AM or PM, for example: 05:10 PM, so I want to validate the first 5 characters and free the rest, I think it's correct.

So, what am I missing to make it run?

Answer 1

Your rule is well done BUT you need to know, specify validation rules with regex separated by pipeline can lead to undesired behavior.

The proper way to define a validation rule should be:

'title' => 'required|max:100|regex:/^(?=.*[a-zA-Z]).+$/',
'start_time' => ['date_format:H:i','regex:/^((([01]?[0-9]|2[0-3]):[0-5][0-9])?)$/'],

You can read on the official docs:

regex:pattern

The field under validation must match the given regular expression.

Note: When using the regex pattern, it may be necessary to specify rules in an array instead of using pipe delimiters , especially if the regular expression contains a pipe character.

https://laravel.com/docs/5.6/validation#rule-regex

Answer 2

Try this:

'start_time' => ['date_format:H:i', 'regex:/^((([01]?[0-9]|2[0-3]):[0-5][0-9])?)$/'],

The problem is the | character in the regular expression. Laravel uses it as a separator between rules.

Answer 3

The character pipe | in regex conflicts with | in seprating rules. You have to initialize an array:

'start_time' => ['date_format:H:i', 'regex:/^((([01]?[0-9]|2[0-3]):[0-5][0-9])?)$/']