How can variables be maintained and accessed within loops in PHP to avoid redefinition or loss of data?

To maintain and access variables within loops in PHP without redefinition or loss of data, you can use the static keyword when declaring the variable inside the loop. This ensures that the variable retains its value across iterations of the loop. 

for ($i = 0; $i < 5; $i++) {
    static $counter = 0;
    $counter++;
    echo $counter . "<br>";
}

Keywords

PHP variables loops scope redefinition

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