The expression $type of type string|null is loosely compared to true; this is ambiguous if the string can be empty. You might want to explicitly use !== null instead.
In PHP, under loose comparison (like ==, or !=, or switch conditions),
values of different types might be equal.
For string values, the empty string '' is a special case, in particular
the following results might be unexpected:
''==false// true''==null// true'ab'==false// false'ab'==null// false// It is often better to use strict comparison''===false// false''===null// false
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368
12
static::reportInvalidArgument(\sprintf(
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$message ?: 'Expected a resource of type %2$s. Got: %s',
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878
static::typeToString($value),
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$type
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878
));
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8
}
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8
}
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8
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/**
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* @psalm-assert callable $value
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874
*
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* @param mixed $value
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16
* @param string $message
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*/
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public static function isCallable($value, $message = '')
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12
{
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if (!\is_callable($value)) {
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12
static::reportInvalidArgument(\sprintf(
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12
$message ?: 'Expected a callable. Got: %s',
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static::typeToString($value)
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));
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4
}
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}
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16
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/**
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16
* @psalm-assert array $value
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4
*
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4
* @param mixed $value
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4
* @param string $message
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4
*/
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public static function isArray($value, $message = '')
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{
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12
if (!\is_array($value)) {
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static::reportInvalidArgument(\sprintf(
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20
$message ?: 'Expected an array. Got: %s',
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static::typeToString($value)
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20
));
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20
}
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8
}
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/**
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* @deprecated use "isIterable" or "isInstanceOf" instead
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12
*
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12
* @psalm-assert iterable $value
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12
*
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12
* @param mixed $value
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* @param string $message
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*/
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public static function isTraversable($value, $message = '')
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23
{
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@\trigger_error(
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\sprintf(
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8
'The "%s" assertion is deprecated. You should stop using it, as it will soon be removed in 2.0 version. Use "isIterable" or "isInstanceOf" instead.',
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8
__METHOD__
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8
),
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\E_USER_DEPRECATED
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);
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15
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if (!\is_array($value) && !($value instanceof Traversable)) {
webmozart /
assert
Gert de Pagter
In PHP, under loose comparison (like
==, or!=, orswitchconditions), values of different types might be equal.For
stringvalues, the empty string''is a special case, in particular the following results might be unexpected: