只要做：

$row = str_replace("&", "&", $row);

**注意：**您的foreach不工作，因为您需要引用，或使用键：

foreach ( $columns as &$value) { // reference
   $value  = str_replace("&", "&", $value);
}
unset($value); // break the reference with the last element

或者：

foreach ($columns as $key => $value){
   $columns[$key]  = str_replace("&", "&", $value);
}

虽然这里不需要，因为str_replace接受并返回数组。

您应该通过引用调用它，否则foreach将创建$value的重复副本
foreach ( $columns as &$value)

另一个解决方案是像这样使用PHP array_walk：

function custom_replace( &$item, $key ) {
   $item = str_replace('22', '75', $item);
} 

// Init dummy array.
$columns = array('Cabbage22', 'Frid22ay', 'Internet', 'Place22', '22Salary', '22Stretch', 'Whale22Inn');

// Print BEFORE.
echo 'Before: ';
print_r($columns);

// Make the replacements.
array_walk($columns, 'custom_replace');

// Print AFTER.
echo 'After:';
print_r($columns);

输出：

Before: Array
(
    [0] => Cabbage22
    [1] => Frid22ay
    [2] => Internet
    [3] => Place22
    [4] => 22Salary
    [5] => 22Stretch
    [6] => Whale22Inn
)
After: Array
(
    [0] => Cabbage75
    [1] => Frid75ay
    [2] => Internet
    [3] => Place75
    [4] => 75Salary
    [5] => 75Stretch
    [6] => Whale75Inn
)