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PHP Variable Naming Rules

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While we have much freedom in choosing the names of our variables when writing a program, there are still always a set of rules we must abide by. The following are the PHP variable naming rules which I have taken from w3schools.

  • A variable name must start with a letter or an underscore “_”
  • A variable name can only contain alpha-numeric characters and underscores (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 underscore ($my_string), or with capitalization ($myString)

Posted in PHP on May 17th, 2007

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