php delete array specified string function

In PHP, array is a very useful data type that allows us to organize and store large amounts of related data. Sometimes we need to delete some specific string elements in the array. This article will introduce how to use PHP language functions to delete specified string elements in an array.

PHP provides many functions for processing arrays, one of the very useful functions is the array_splice() function. This function can delete some elements from the array and insert new elements where needed. However, sometimes we only need to delete specific string elements in the array, so we can customize a function specifically used to delete specified string elements.

First, we need to define a function that will accept two parameters - the array and the string element to be deleted. We can use PHP's foreach loop to traverse the array, find and delete the specified string element. The code is as follows:

function deleteElementFromArray($array, $elementToDelete) {
    foreach($array as $key => $value) {
        if($value === $elementToDelete) {
            unset($array[$key]);
        }
    }
    return $array;
}

In the above code, the first parameter of the function is the array to be processed, and the second parameter is the string element to be deleted. Inside the function, we use a foreach loop to traverse the entire array, and use an if statement to determine whether the current element is equal to the element to be deleted. If so, we use PHP's built-in unset() function to delete the element from the array. Finally, the function returns the array with the specified string elements removed.

Next, we can use this function to delete specific string elements in the array. It should be noted that the array parameter passed by the function is a pass-by-value rather than a pass-by-reference form. Therefore, deleting elements inside the function does not affect the original array itself. The code is as follows:

$myArray = ['apple', 'orange', 'banana', 'orange', 'watermelon', 'orange'];
$resultArray = deleteElementFromArray($myArray, 'orange');
print_r($resultArray);

In the above code, we define a $myArray array, which contains multiple "orange" elements. We then call the deleteElementFromArray function to delete all "orange" elements from the $myArray array. Finally, we use the print_r() function to output the array after deleting the elements, and get the following results:

Array
(
    [0] => apple
    [2] => banana
    [4] => watermelon
)

As you can see, all the "orange" elements in the original array are successfully deleted, and a new array is returned.

Summary:

This article introduces how to use PHP language functions to delete specified string elements in an array. We defined a custom function to traverse the array through a foreach loop to determine whether it is equal to the element to be deleted. If so, use PHP's built-in unset() function to delete the element. Finally, we use this function to delete the specified string element in the array, and successfully get the new array after deleting the element.

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