php Laravel 5.4 - 使用正则表达式验证
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Laravel 5.4 - Validation with Regex
提问by Black
Below is my rule for project name:
以下是我对项目名称的规则：
$this->validate(request(), [
'projectName' => 'required|regex:/(^([a-zA-z]+)(\d+)?$)/u',
];
I am trying to add the rule such that it must start with a letter from a-zor A-zand can end with numbers but most not.
我正在尝试添加规则，使其必须以来自or的字母开头，并且可以以数字结尾，但大多数不是。a-zA-z
Valid values for project name:
项目名称的有效值：
myproject123
myproject
MyProject
Invalid values for project name:
项目名称的无效值：
123myproject
!myproject
myproject 123
my project
my project123
I tried my regex online:
我在网上尝试了我的正则表达式：
https://regex101.com/r/FylFY1/2
https://regex101.com/r/FylFY1/2
It should work, but I can pass the validation even with project 123.
它应该可以工作，但即使使用project 123.
UPDATE: It actually works, I just tested it in the wrong controller, im sorry... but maybe it will help others nevertheless
更新：它确实有效，我只是在错误的控制器中测试了它，对不起......但也许它会帮助其他人
回答by Troyer
Your rule is well done BUTyou need to know, specify validation rules with regex separated by pipeline can leadto undesired behavior.
您的规则做得很好，但您需要知道，使用由管道分隔的正则表达式指定验证规则可能会导致不良行为。
The proper way to define a validation rule should be:
定义验证规则的正确方法应该是：
$this->validate(request(), [
'projectName' =>
array(
'required',
'regex:/(^([a-zA-Z]+)(\d+)?$)/u'
)
];
You can read on the official docs:
您可以阅读官方文档：
regex:pattern
The field under validation must match the given regular expression.
Note: When using the regex / not_regex patterns, it may be necessary to specify rules in an array instead of using pipe delimiters, especially if the regular expression contains a pipe character.
正则表达式：模式
验证字段必须与给定的正则表达式匹配。
注意：当使用 regex / not_regex 模式时，可能需要在数组中指定规则而不是使用管道分隔符，尤其是当正则表达式包含管道字符时。
