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
Loading history...
368
12
static::reportInvalidArgument(\sprintf(
369
$message ?: 'Expected a resource of type %2$s. Got: %s',
370
878
static::typeToString($value),
371
$type
372
878
));
373
8
}
374
8
}
375
8
376
/**
377
* @psalm-assert callable $value
378
874
*
379
* @param mixed $value
380
16
* @param string $message
381
*/
382
16
public static function isCallable($value, $message = '')
383
12
{
384
12
if (!\is_callable($value)) {
385
12
static::reportInvalidArgument(\sprintf(
386
12
$message ?: 'Expected a callable. Got: %s',
387
static::typeToString($value)
388
));
389
4
}
390
}
391
16
392
/**
393
16
* @psalm-assert array $value
394
4
*
395
4
* @param mixed $value
396
4
* @param string $message
397
4
*/
398
public static function isArray($value, $message = '')
399
{
400
12
if (!\is_array($value)) {
401
static::reportInvalidArgument(\sprintf(
402
20
$message ?: 'Expected an array. Got: %s',
403
static::typeToString($value)
404
20
));
405
20
}
406
8
}
407
408
/**
409
* @psalm-assert iterable $value
410
12
*
411
12
* @deprecated use "isIterable" or "isInstanceOf" instead
412
12
*
413
12
* @param mixed $value
414
* @param string $message
415
*/
416
public static function isTraversable($value, $message = '')
417
23
{
418
@\trigger_error(
419
23
\sprintf(
420
8
'The "%s" assertion is deprecated. You should stop using it, as it will soon be removed in 2.0 version. Use "isIterable" or "isInstanceOf" instead.',
421
8
__METHOD__
422
8
),
423
\E_USER_DEPRECATED
424
);
425
15
426
if (!\is_array($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: