读取多个.txt文件，并使用php将主题保留在一个简单的数组中

Question

I'm trying to read multiple files and put them in a single array.

My code look like this :

      $directory = "./folder/folder/"
        $file_array = array();
        if ($condition == 'TRUE'){
        $file_array = array(
                    'file_1.txt',
                    'file_2.txt',
                    'file_3.txt',
                    'file_4.txt'
                );
        }

        foreach($file_array as $file){
                        $single_file_arr[] = file($directory . $file);
                    }
    echo "<pre>";
    print_r($single_file_arr);
    echo "</pre>";

//OUTPUTS:
Array
(
    [0] => Array
        (
            [0] => value1
            [1] => value2
            [2] => value3
        )
    [1] => Array
        (
            [0] => value4
            [1] => value5
        )
    [2] => Array
        (
            [0] => value6
            [1] => value7
        )
    [3] => Array
        (
            [0] => value8
            [1] => value9
        )

)

So how To use array_merge($single_file_arr) to keep all the arrays in a single array.

Where am wrong? I want to be in one single array.

//I WANT TO BE :

Array
    (
        [0] => value1
        [1] => value2
        [2] => value3
        .
        .
        .
        [8] => value9
    )

Answer 1

$directory = "./folder/folder/"
$file_array = [];
if ($condition == 'TRUE') {
    $file_array = [
        'file_1.txt',
        'file_2.txt',
        'file_3.txt',
        'file_4.txt'
    ];
}

$single_file_arr = [];
foreach ($file_array as $file) {
    $single_file_arr = array_merge($single_file_arr, file($directory . $file));
}

Answer 2

You are using file ( http://php.net/manual/en/function.file.php ) function, that returns contents of the file as an array. So you should use file_get_contents ( http://php.net/manual/en/function.file-get-contents.php ) to read contents directly as a string.

So change...

file($directory . $file);

to

file_get_contents($directory . $file);

and it will be like you needed.