Are PHP functions case sensitive?

Are PHP functions case sensitive?

php function case-sensitive

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PHP & Case Sensitivity [duplicate]

php case-sensitive case-insensitive

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PHP array, Are array indexes case sensitive?

php arrays case-sensitive

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Case-inconsistency of PHP file paths on Mac / MAMP?

php path mamp case-sensitive

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Case-sensitive where statement in laravel

php mysql laravel-4 eloquent case-sensitive

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Sort array items in PHP so that it is not case sensitive to letters

php sorting case-sensitive

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Does HTTP hostname case (upper/lower) matter?

php http dns case-sensitive

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Trying to make a class called "List", but the list() function is breaking it

php function class case-sensitive

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