Problems creating dynamic associative array

Question

I want to create dynamic associative array from two array's one array is be used ($l_arr) for key and other array is used for value ($r_arr) when i display $map in output i can see there is associative array created but when i print echo $map['key'] output is blank please help me guyz. here is the code and output,

<?php


$handle = fopen ("php://stdin","r");
fscanf($handle,"%d",$n);

for($i=0;$i<$n;$i++)
{
     $arr_temp = fgets($handle);
     $l_arr[$i]= preg_replace("/[0-9,.]/", "", $arr_temp);
     $r_arr[$i]=preg_replace("/[^0-9,.]/", "", $arr_temp);

}
for($i=0;$i<$n;$i++)
{
$arr_temp = fgets($handle);
$op[$i]=$arr_temp;
}
          for($i=0;$i<$n;$i++)
    {

        $map[$l_arr[$i]]=$r_arr[$i];

     }
print_r($map);

echo "value of sam is".$map['sam'];

?>

and output is

Array
(
    [sam 
] => 99912222
    [tom 
] => 11122222
    [harry 
] => 12299933
)

value of sam is

Tajgeer · Accepted Answer · 2017-07-13 06:59:51Z

1

As you can probably see, there are whitespaces in your output - look at new lines after each array index. You need to trim() your preg_replace() here:

$l_arr[$i] = trim(preg_replace("/[0-9,.]/", "", $arr_temp));
$r_arr[$i] = trim(preg_replace("/[^0-9,.]/", "", $arr_temp));

answered Jul 13, 2017 at 6:59

Tajgeer

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