Are PHP Function Names Case-Sensitive?

Case Sensitivity in PHP Function Names

While exploring code, you may encounter questions regarding the case sensitivity of PHP function names. Similarly, a recent query arose concerning the case sensitivity of mySQL_fetch_array function calls.

The PHP documentation states the following:

"Function names are case-insensitive, though it is usually good form to call functions as they appear in their declaration."

This implies that user-defined functions are not case-sensitive. However, a proposal was considered to make functions and objects case-sensitive in PHP5.

In practice, it is recommended to follow the convention of using the same casing as the function declaration for consistency and readability.

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