php二维数组如何转化成一维数组

可以使用PHP的array_merge()函数将二维数组转化为一维数组。具体操作如下：

$twoDimensionalArray = array(array('apple', 'banana'),array('orange', 'grape'),array('melon', 'watermelon'));$oneDimensionalArray = array();foreach ($twoDimensionalArray as $subArray) {$oneDimensionalArray = array_merge($oneDimensionalArray, $subArray);}print_r($oneDimensionalArray);

输出结果为：

Array([0] => apple[1] => banana[2] => orange[3] => grape[4] => melon[5] => watermelon)