in_array()
8th February 2021
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Programming Language
PHP [Versions: 4, 5, 7, 8]
Syntax
Typical Usage
Checks an array to determine if a value exists.
Accepted Parameters
- $needle (mixed) (Required): The value to look for.
- $haystack (array) (Required): The array to search.
- $strict (boolean) (Optional) (Default = false): If set to true, data types will also be compared. ie, the integer 1 will be seen as different from the string “1” .
Return Value(s)
Returns true or false depending on whether or not the requested value exists.Notes
Important:
If $needle is a string, the comparison is done in a case-sensitive manner.
Examples
Example 1
<?php
$pets_array = ['dogs', 'cats', 'birds', 'fish'];
if(in_array('cats', $pets_array)){
echo 'Yes, she has cats.';
}
else {
echo 'No, she doesn't have a single cat.';
}The above will output “Yes, she has cats.” because ‘cats’ is in the array.
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