這是一個例子：$original_string = 'I like apples very much. I want an apple.';$temp_string = str_replace('apples', '_apples_', $original_string);// $temp_string is now: I like _apples_ very much. I want an apple.$final_string = str_replace('apple', '_apple_', $temp_string);// $final_string is now: I like __apple_s_ very much. I want an _apple_.這不是我打算做的。我希望最終的字符串是：I like _apples_ very much. I want an _apple_.這就是我試圖做的：$original_string = 'I like apples very much. I want an apple.';$final_string = str_replace(['apples', 'apple'], ['_apples_', '_apple_'], $original_string);echo $original_string;// I like __apple_s_ very much. I want an _apple_. 顛倒更換順序也無濟(jì)于事：$original_string = 'I like apples very much. I want an apple.';$original_string = str_replace(['apple', 'apples'], ['_apple_', '_apples_'], $original_string);echo $original_string;// I like _apple_s very much. I want an _apple_. 我應(yīng)該怎么辦？