range - Get a specified rows amount from an array -

i have array 1000 rows , want convert string 50 rows of it.

 $thearray = array         (           [0] => row1           [1] => row2           [2] => row3           [3] => row4           [4] => row5           [5] => row6           ...           [999] => row1000         ) 

the output should use:

$string1 = implode(',', $thearray); 

but said need $string1 have 50 rows array , if possible, them randomized. need advices. thx

you try this, see comments in code explanations , http://3v4l.org/hjuv6 demonstration

// lets create dummy array $array = array();  for($i = 0; $i < 1000; $i++) {   $array[] = $i; }  // lets make randomized temporary array $backuparray = $array; $temparray = array();  for($i = 0; $i < 50; $i++) {    // select random index   $randomindex = rand(0 , count($backuparray));   // copy temp array   $temparray[] = $backuparray[$randomindex];   // delete row our backup   unset($backuparray[$randomindex]);   // reorganize key indexes   $backuparray = array_values($backuparray); }   $string1 = implode(",", $temparray);  var_dump($string1);