How can I check the text contains number or symbol?

[iamwsumit (Sumit Kumar)]

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How to check any special characters in Text

I want to check if my specified text does not contains any character which is apart from [ a - z ]. in brief: I want to check if my text contains any of the following characters: `~!@#$%^&*()-_+=*][|{};':"<>,./? and neither any emojis. ( I neither want to run in a plenty amount of if-else blocks )

How to find special characters in a text

Hello everyone I am using firebase for storing my app data but u all know firebase doesn’t accept special characters if any user enter special characters in textbox then how can I find special characters in textbox and how can I remove them.