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Title: PHP: empty - Manual

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DescriptionDetermine whether a variable is empty
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Variable handling Functionshttps://php.net/ref.var.php
boolvalhttps://php.net/function.boolval.php
debug_​zval_​dumphttps://php.net/function.debug-zval-dump.php
doublevalhttps://php.net/function.doubleval.php
emptyhttps://php.net/function.empty.php
floatvalhttps://php.net/function.floatval.php
get_​debug_​typehttps://php.net/function.get-debug-type.php
get_​defined_​varshttps://php.net/function.get-defined-vars.php
get_​resource_​idhttps://php.net/function.get-resource-id.php
get_​resource_​typehttps://php.net/function.get-resource-type.php
gettypehttps://php.net/function.gettype.php
intvalhttps://php.net/function.intval.php
is_​arrayhttps://php.net/function.is-array.php
is_​boolhttps://php.net/function.is-bool.php
is_​callablehttps://php.net/function.is-callable.php
is_​countablehttps://php.net/function.is-countable.php
is_​doublehttps://php.net/function.is-double.php
is_​floathttps://php.net/function.is-float.php
is_​inthttps://php.net/function.is-int.php
is_​integerhttps://php.net/function.is-integer.php
is_​iterablehttps://php.net/function.is-iterable.php
is_​longhttps://php.net/function.is-long.php
is_​nullhttps://php.net/function.is-null.php
is_​numerichttps://php.net/function.is-numeric.php
is_​objecthttps://php.net/function.is-object.php
is_​realhttps://php.net/function.is-real.php
is_​resourcehttps://php.net/function.is-resource.php
is_​scalarhttps://php.net/function.is-scalar.php
is_​stringhttps://php.net/function.is-string.php
issethttps://php.net/function.isset.php
print_​rhttps://php.net/function.print-r.php
serializehttps://php.net/function.serialize.php
settypehttps://php.net/function.settype.php
strvalhttps://php.net/function.strval.php
unserializehttps://php.net/function.unserialize.php
unsethttps://php.net/function.unset.php
var_​dumphttps://php.net/function.var-dump.php
var_​exporthttps://php.net/function.var-export.php
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