How to Check if a String Contains Any Array Element (Case-Insensitive)?

Searching for Array Items within a String (Case Insensitive)

In various programming scenarios, it may be necessary to determine whether a given string contains any of the elements specified in an array. This task can be particularly challenging when case insensitivity is required.

To address this, we can leverage a custom PHP function named contains(). This function efficiently checks if a string ($str) contains any of the items ($arr) present in an array:

function contains($str, array $arr)
{
    foreach($arr as $a) {
        if (stripos($str,$a) !== false) return true;
    }
    return false;
}

The stripos() function used within the loop performs a case-insensitive search for the array element within the string. If any match is found, the function returns true; otherwise, it returns false, indicating that the string doesn't contain any of the specified array elements.

For example, consider the following code snippet:

$string = 'My nAmE is Tom.';
$array = array("name","tom");
if(contains($string,$array))
{
    // The string contains at least one element from the array, so do something.
}

The contains() function iterates through each element in the array, performing a case-insensitive search. In this example, the string contains the element "name," which satisfies the condition. As a result, the if statement will be executed, and any desired action can be performed.

By employing this custom function, programmers can efficiently determine whether a string contains any items from an array, regardless of case sensitivity.

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