How to take multiple values in an input type text (text box) separated by a comma in PHP Explode function in PHP The explode function is used to split a string into pieces by a specified string i.e. it breaks a string into an array.

47 - HTML input text field | HTML input text box; 48 - HTML password field | HTML input password; 49 - HTML radio button tutorial | HTML Radio buttons; 50 - HTML checkbox tutorial | HTML Check boxes; 51 - HTML select tag | HTML option tag | HTML drop-down

I have an HTML form with a select input and predefined values. Actually, it does its job but I noticed in Chrome that if I change in the code, via the built-in addon "search elements", the value to 100000005555555, it will also be accepted but i