PhpStorm未识别PHPDoc的string[]类型约束，传入数字数组无报错

Hey there, I see the issue you're facing—PhpStorm isn't flagging the mismatch when you pass an array of integers to a method annotated with @param string[] $emails. Let's get this sorted out:

First, let's confirm your PHPDoc is correctly written (yours looks perfect!):

class Slack { 
    /** 
     * @param string[] $emails 
     */ 
    public static function export($emails) : void {} 
}
Slack::export([1,2,3]); // Should trigger an error but doesn't
Slack::export(['1','2','3']); // Correct, no error expected

The problem here is likely that PhpStorm's type compatibility inspection for array elements isn't enabled or is set to a low severity level. Here's how to fix it step by step:

• Open PhpStorm's Settings:
  • On Windows/Linux: Go to File > Settings
  • On macOS: Go to PhpStorm > Settings
• Navigate to Editor > Inspections > PHP > Type compatibility
• Find the Type mismatch option and check the box next to it
• Set the severity level to Error or Warning (this ensures you'll get a clear visual indicator for the mismatch)

If the above doesn't resolve the issue right away, try clearing PhpStorm's cache—stale cached data can sometimes interfere with proper inspections:

• Go to File > Invalidate Caches...
• Select the Invalidate and Restart option to refresh the IDE's cache and restart PhpStorm

Once you've made these changes, PhpStorm should correctly flag Slack::export([1,2,3]); as a type mismatch, since the array contains integers instead of the expected strings.

内容的提问来源于stack exchange，提问作者Chris