printing from an array php

Question

Trying to print an integer from an array in php.

I am attempting a question on the coding site hackerrank.

The pre-supplied function takes in a string input and manipulates it into an array like so:

<?php

$handle = fopen ("php://stdin","r");
fscanf($handle,"%d",$n);
$a = array();
for($a_i = 0; $a_i < $n; $a_i++) {
   $a_temp = fgets($handle);
   $a[] = explode(" ",$a_temp);
  array_walk($a[$a_i],'intval');
}

echo $a[0];

?>

However running

echo $a[0]

results the following error:

PHP Notice:  Array to string conversion in solution.php on line 12

and outputs:

Array

I understand that this is because I am trying to manipulate the array as a string but I am not sure how else one could print out indexed values. Ideally I would like to use a c-type for loop:

for($x = 0; $x < $n; $x++) {
    echo $a[$x];
}

Using print_r($a[0]) gives the following output:

You can use print_r() or var_dump() to see what's the value of an array — Berserk
– Berserk, Commented Feb 18, 2016 at 10:33

KittMedia · Accepted Answer · 2016-02-18 10:31:37Z

1

For printing an array use print_r().

Example: print_r($a[0]);

$a[0] is an array in this scope and not a string.

answered Feb 18, 2016 at 10:31

KittMedia

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3 Comments

timothyylim Over a year ago

Would it be possible for me to print just the integer at index 0? I've added an image of the output given by print_r($a[0])

KittMedia Over a year ago

You have a multidimensional array. To can use echo $a[0][0], which would print 11 in your case.echo $a[0][1] would print 2.

timothyylim Over a year ago

Yes that works-thanks. Might be out of scope, but what is the benefit of creating such an array?

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