Multidimensional Arrays help

[snowboardr]

I have been trying to learn more about Multidimensional Arrays. How do i get lettercount in this array only based off the letter not the index number...


here is my array output:

$alpha_count => Array (22)
(
|    ['0'] => Array (2)
|    (
|    |    ['letter'] = String(1) "a"
|    |    ['lettercount'] = String(1) "1"
|    )
|    ['1'] => Array (2)
|    (
|    |    ['letter'] = String(1) "b"
|    |    ['lettercount'] = String(1) "3"
|    )
|    ['2'] => Array (2)
|    (
|    |    ['letter'] = String(1) "c"
|    |    ['lettercount'] = String(1) "1"
|    )
|    ['3'] => Array (2)
|    (
|    |    ['letter'] = String(1) "d"
|    |    ['lettercount'] = String(1) "1"
|    )
|    ['4'] => Array (2)
|    (
|    |    ['letter'] = String(1) "e"
|    |    ['lettercount'] = String(1) "2"
|    )
|    ['5'] => Array (2)
|    (
|    |    ['letter'] = String(1) "f"
|    |    ['lettercount'] = String(1) "1"
|    )
|    ['6'] => Array (2)
|    (
|    |    ['letter'] = String(1) "g"
|    |    ['lettercount'] = String(1) "2"
|    )
|    ['7'] => Array (2)
|    (
|    |    ['letter'] = String(1) "h"
|    |    ['lettercount'] = String(1) "7"
|    )
|    ['8'] => Array (2)
|    (
|    |    ['letter'] = String(1) "i"
|    |    ['lettercount'] = String(1) "1"
|    )
|    ['9'] => Array (2)
|    (
|    |    ['letter'] = String(1) "j"
|    |    ['lettercount'] = String(1) "2"
|    )
|    ['10'] => Array (2)
|    (
|    |    ['letter'] = String(1) "k"
|    |    ['lettercount'] = String(1) "1"
|    )
|    ['11'] => Array (2)
|    (
|    |    ['letter'] = String(1) "l"
|    |    ['lettercount'] = String(1) "1"
|    )
|    ['12'] => Array (2)
|    (
|    |    ['letter'] = String(1) "m"
|    |    ['lettercount'] = String(1) "1"
|    )
|    ['13'] => Array (2)
|    (
|    |    ['letter'] = String(1) "n"
|    |    ['lettercount'] = String(1) "1"
|    )
|    ['14'] => Array (2)
|    (
|    |    ['letter'] = String(1) "o"
|    |    ['lettercount'] = String(1) "1"
|    )
|    ['15'] => Array (2)
|    (
|    |    ['letter'] = String(1) "p"
|    |    ['lettercount'] = String(1) "2"
|    )
|    ['16'] => Array (2)
|    (
|    |    ['letter'] = String(1) "r"
|    |    ['lettercount'] = String(1) "2"
|    )
|    ['17'] => Array (2)
|    (
|    |    ['letter'] = String(1) "s"
|    |    ['lettercount'] = String(3) "343"
|    )
|    ['18'] => Array (2)
|    (
|    |    ['letter'] = String(1) "t"
|    |    ['lettercount'] = String(1) "1"
|    )
|    ['19'] => Array (2)
|    (
|    |    ['letter'] = String(1) "v"
|    |    ['lettercount'] = String(1) "2"
|    )
|    ['20'] => Array (2)
|    (
|    |    ['letter'] = String(1) "w"
|    |    ['lettercount'] = String(1) "1"
|    )
|    ['21'] => Array (2)
|    (
|    |    ['letter'] = String(1) "z"
|    |    ['lettercount'] = String(1) "1"
|    )
)

Jason

[red]Army[/red] : [white]Combat Engineer[/white] : [blue]21B[/blue]

 

[jpadie]

that's not quite the way to create your array, to be honest.

better would be this.
You could then address each frequency by referring to
$output['letter'];

<?php
$string = "I am a string";

$output = getFrequency($string);
print_r($output);

function getFrequency($string){
	//easier this way.  if case sensitivity required, delete this line
	$string = strtolower($string);
	//make dummy array of zero freqs for each letter
	for($l=97;$l<=122; $l++){
		$dummy[chr($l)] = 0;
	}
	
	//check the actual string
	foreach (count_chars($string, 1) as $letter=>$freq){
		//capture only alpha
		if ($letter >= 97 && $letter <=122){
			$output[chr($letter)] = $freq;
		}
 	}
	 //sort the array
	 ksort($output, SORT_STRING);
	 //merge the array with the dummy to keep the zero vals
	 $output = array_merge($dummy, $output);
	 return $output;
}
?>

 

[Kozusnik]

From what you already have, you'd need to loop through that array with a FOR, FOREACH, or WHILE statement. Jpadie's suggestion would return a hash that would be better to use...something like...

['a'] => 1
['b'] => 3
...

From what you already have, you could...

$newarray = array();
foreach ($alpha_count as $row){
   $letter = strtolower($row['letter']);
   $count = $row['lettercount'];

   $newarray[$letter] = $count;
}

But I would try to skip this step and make the output array easier to use from the start.

Mark