Question

How to shift array elements to left by one position in PHP

Answer 1

function ShiftArrayToLeft(&$arr) {
    $size = count($arr);
    
    $temp = $arr[0];
    
    for ($i = 0; $i < $size - 1; $i++) {
        $arr[$i] = $arr[$i + 1];
    }
    
    $arr[$size - 1] = $temp;
}

$arr = array(1, 2, 3, 4, 5, 6, 7, 8, 9);

ShiftArrayToLeft($arr);
        
for ($i = 0; $i < count($arr); $i++) {
    echo strval($arr[$i]) . " ";
}




/*
run:

2 3 4 5 6 7 8 9 1 

*/

 

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