Array Special Characters to String

Question

I am creating password generator, I am dealing at the moment with array of special characters to transfer them into string. I have special characters saved in cvs file, using as array to slice based on how many special characters should be in password, then I want to make them string and concatenate with numbers and letters.

    $list = './SpecialChar.csv';
    $e = array_map('str_getcsv', file($list));

    //$nRange telling how many characters should be slice
    $nRange = $length-($numb*2)-$specialChar;

    shuffle($e);
    $s = array_slice($e,0,$nRange);
    $sString = implode(" ",$s); //does not work
    $sString = htmlentities(implode(" ",$s)); //does not work

I am getting error Notice: Array to string conversion when using implode — NKU, Aug 05 '19 at 12:18
Can you give us the output of `var_dump($s)` before the `implode`? — Martin Dimitrov, Aug 05 '19 at 12:19
I would really advice against using the .csv file to store your list of special chars. Also, I would try to find some meaningful names for the variables. — Angelin Calu, Aug 05 '19 at 12:25
array(2) { [0]=> array(1) { [0]=> string(1) "-" } [1]=> array(1) { [0]=> string(1) "*" } } — NKU, Aug 05 '19 at 12:25
@NKU implode as you can check in https://www.php.net/manual/en/function.implode.php implodes string not array so if you want to implode subarray you can use array_map or something, I'll add a comment in a while — angel.bonev, Aug 05 '19 at 12:30
Possible duplicate https://stackoverflow.com/questions/16710800/implode-data-from-a-multi-dimensional-array — angel.bonev, Aug 05 '19 at 12:51

score 0 · Accepted Answer · answered Aug 05 '19 at 12:44

0

implode only accepts string so if you try to convert array to string this will return you "string(5) "Array"" no matter what it's in the array

var_dump((string)["T","E","S","T"]);

So when you try to implode multidimensional array you will get something like this

    $test = [["-"], ["*"]];
var_dump(implode(" ", $test)); //THIS WILL GIVE YOU Notice: Array to string conversion when using implode , but it will return string(11) "Array Array"

If dimensional are only two you can use array_map

$test = [["-"], ["*"]];
var_dump(implode(" ", array_map(function ($row) {
                        return is_array($row)?implode($row):$row;
                    }, $test))); //returns string(3) "- *"

answered Aug 05 '19 at 12:44

angel.bonev

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thank @angel.bonev, I am still trying to figure then how to concatenate strings of $letters and $numbers. ``` $n = range(0,9); shuffle($n); $numbers = array_slice($n,0,$nRange); $numbersString = implode(" ",$numbers);```, because $test is still just array, looks like I have safe all special characters in array, but it does not work, if I am creating regular array – NKU Aug 05 '19 at 13:46
@NKU Implode expects one dimensional array you can't concatenate multydimensional arrays only with implode, it converts every element to string, so you can foreach all you data and merge it into one dimensional array or use something like array_map – angel.bonev Aug 05 '19 at 15:19

Array Special Characters to String

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