Programming PHP

ftell
int ftell(int handle)
Returns the byte offset to which the file referenced by handle is set. If an error occurs,
returns false.
ftruncate
int ftruncate(int handle, int length)
Truncates the file referenced by handle to length bytes. Returns true if the operation is
successful and false if not.
func_get_arg
mixed func_get_arg(int index)
Returns the index element in the function argument array. If called outside a function, or if
index is greater than the number of arguments in the argument array, func_get_arg( )
generates a warning and returns false.
func_get_args
array func_get_args( )
Returns the array of arguments given to the function as an indexed array. If called outside a
function, func_get_args( ) returns false and generates a warning.
func_num_args
int func_num_args( )
Returns the number of arguments passed to the current user-defined function. If called
outside a function, func_num_args( ) returns false and generates a warning.
function_exists
bool function_exists(string function)
Returns true if a function with function has been defined, and false otherwise. The
comparison to check for a matching function is case-insensitive.
fwrite
int fwrite(int handle, string string[, int length])
404 | Appendix A: Function Reference
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