Re: PHP Challenge

[ddliu]

Here is my solution:

$file='numbers.txt';

$fp=fopen($file,'r');



$sum=0;

$chars=array();



//parse line by line to save memory

while(false!==$line=fgets($fp)){

$line=trim($line);

if(is_numeric($line)){

$sum+=$line;

}

else{

if(!isset($chars[$line])){

$chars[$line]=1;

}

else{

$chars[$line]++;

}

}

}



//close file

fclose($fp);



//sort chars

ksort($chars);



//print result

echo 'Sum: '.$sum.PHP_EOL;

foreach($chars as $char=>$num){

echo $char.':'.$num.PHP_EOL;

}