How to Efficiently Concatenate Array Elements into a Comma-Separated String in PHP?

Concatenating Array Items into a Comma-Separated List in PHP

Manipulating an array and converting it into a comma-separated string is a common coding task. In PHP, there are various approaches to achieve this, but the most straightforward method is to utilize the implode function.

To create a comma-separated list from an array, invoke the implode function as follows:

implode(', ', $array);

Where $array contains the items that need to be concatenated. For instance:

$fruit = ['apple', 'banana', 'pear', 'grape'];
$commaList = implode(', ', $fruit); // Result: "apple, banana, pear, grape"

An alternative approach involves manual concatenation using a loop:

$fruitList = '';
foreach ($fruit as $fruit) {
    $fruitList .= $prefix . '"' . $fruit . '"';
    $prefix = ', ';
}

However, this method requires meticulous handling of the delimiter placement. If trimming the final comma is necessary, simply use rtrim($list, ', ').

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