Error: The name can only contain underscores and alphanumeric characters. It must begin with a letter and be unique, and must not include spaces, end with an underscore, or contain two consecutive
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laravel - The directive name [] is not valid. Directive names must only contain alphanumeric characters and underscores - Stack Overflow
![Mistake in help text - should be underscore NOT hyphens · Issue #20 · backdrop-contrib/fanciblock · GitHub Mistake in help text - should be underscore NOT hyphens · Issue #20 · backdrop-contrib/fanciblock · GitHub](https://user-images.githubusercontent.com/3144571/69199548-e8fb2c00-0afd-11ea-82d1-f799d77aae5d.png)
Mistake in help text - should be underscore NOT hyphens · Issue #20 · backdrop-contrib/fanciblock · GitHub
Python: Match a string that contains only upper and lowercase letters, numbers, and underscores - w3resource
![firebase realtime database - Invalid field name "Name ". Fields must contain only letters, numbers, and underscores, start with a letter or underscore, and be at most 128 char - Stack Overflow firebase realtime database - Invalid field name "Name ". Fields must contain only letters, numbers, and underscores, start with a letter or underscore, and be at most 128 char - Stack Overflow](https://i.stack.imgur.com/7YnEC.png)
firebase realtime database - Invalid field name "Name ". Fields must contain only letters, numbers, and underscores, start with a letter or underscore, and be at most 128 char - Stack Overflow
![Fix Instagram Username Can Only Use Letters Digits, Underscore And Full Stops. Problem Solve - YouTube Fix Instagram Username Can Only Use Letters Digits, Underscore And Full Stops. Problem Solve - YouTube](https://i.ytimg.com/vi/UXQhmO0yZkY/hqdefault.jpg)
Fix Instagram Username Can Only Use Letters Digits, Underscore And Full Stops. Problem Solve - YouTube
![Andrew C. Samuels, Information Technology Specialist Trainer c/o Ministry of Education Mona High School, Kingston, Jamaica 1 Problem Solving Section 2: - ppt download Andrew C. Samuels, Information Technology Specialist Trainer c/o Ministry of Education Mona High School, Kingston, Jamaica 1 Problem Solving Section 2: - ppt download](https://images.slideplayer.com/8/2363159/slides/slide_3.jpg)
Andrew C. Samuels, Information Technology Specialist Trainer c/o Ministry of Education Mona High School, Kingston, Jamaica 1 Problem Solving Section 2: - ppt download
![Fix Instagram Username Can Only Use Letters Digits, Underscore And Full Stops. Problem Solve - YouTube Fix Instagram Username Can Only Use Letters Digits, Underscore And Full Stops. Problem Solve - YouTube](https://i.ytimg.com/vi/UXQhmO0yZkY/mqdefault.jpg)