PHP Codex

PHP Syntax, Classes, Functions, Attributes, and Extensions Reference

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is_a
Params and return types changed in PHP 8.0
is_array
Params and return types changed in PHP 8.0
is_bool
Params and return types changed in PHP 8.0
is_callable
Params and return types changed in PHP 8.0
is_countable
Params and return types changed in PHP 8.0
is_dir
Params and return types changed in PHP 8.0
is_double
Params and return types changed in PHP 8.0
is_executable
Params and return types changed in PHP 8.0
is_file
Params and return types changed in PHP 8.0
is_finite
Params and return types changed in PHP 8.0
is_float
Params and return types changed in PHP 8.0
is_infinite
Params and return types changed in PHP 8.0
is_int
Params and return types changed in PHP 8.0
is_integer
Params and return types changed in PHP 8.0
is_iterable
Params and return types changed in PHP 8.0
is_link
Params and return types changed in PHP 8.0
is_long
Params and return types changed in PHP 8.0
is_nan
Params and return types changed in PHP 8.0
is_null
Params and return types changed in PHP 8.0
is_numeric
Params and return types changed in PHP 8.0
is_object
Params and return types changed in PHP 8.0
is_readable
Params and return types changed in PHP 8.0
is_real
Removed in PHP 8.0
is_resource
Params and return types changed in PHP 8.0
is_scalar
Params and return types changed in PHP 8.0
is_soap_fault
Params and return types changed in PHP 8.0
is_string
Params and return types changed in PHP 8.0
is_subclass_of
Params and return types changed in PHP 8.0
is_uploaded_file
Params and return types changed in PHP 8.0
is_writable
Params and return types changed in PHP 8.0
is_writeable
Params and return types changed in PHP 8.0