Laravel 5 Collections: Filtering a Collection Based On Key Presence Using Strict Comparison Operators With whereInStrict

The whereInStrict method is similar to the whereIn method; the difference is that the whereInStrict method will always use strict comparisons where determining the final collection results.

The whereInStrict method does not modify the original collection; it will return a new collection instance.

#Signature

1public function whereInStrict(
2    $key,
3    $values
4);

#Example Use

The $people collection will be used in the following example:

1$people = collect([
2    ['name' => 'Alice', 'age' => 26],
3    ['name' => 'Bob',   'age' => '26'],
4    ['name' => 'Chris', 'age' => 26]
5]);

The second person, Bob, has the same age as the other two people; the difference is that is age is expressed as a string rather than an integer.

The following method calls are functionally equivalent:

1// Using the whereIn method.
2$twentySix = $people->whereIn('age', [26], true);
3 
4$twentySix = $people->whereInStrict('age', [26]);

In both cases, the returned collection would contain two elements; they would contain entries for both Alice and Chris, since their age was expressed as integers.

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