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PHP Variable ?

  • Variables are used for storing a values, like text strings, numbers or arrays.
  • When a variable is declared, it can be used over and over again in our script.
  • All variables in PHP start with a $ sign symbol.
  • The correct way of declaring a variable in PHP:
    $variable_name = value;

Naming rules for variables:-

  • A variable name must start with a letter or an underscore "_".
  • A variable name can only contain alpha-numeric characters and underscores (a-z, A-Z, 0-9, and _ ).
  • A variable name should not contain spaces. If a variable name is more than one word, it should be separated with an underscore ($my_string), or with capitalization ($myString)