Log Line Counter
Hard
PHP
PHP Error Handling
28 views
Problem Statement
Each non-empty line should look like LEVEL:message. LEVEL is INFO, WARN, or ERROR. Count each level and also count invalid lines. Print: info warn error invalid.
Input Format
Multiple lines (may include empty lines).
Output Format
Four integers: info warn error invalid.
Example
INFO:Start WARN:Low disk BAD LINE ERROR:Oops INFO:Done
2 1 1 1
Constraints
Total text
Input / Output Format
Input Format
Multiple lines (may include empty lines).
Output Format
Four integers: info warn error invalid.
Constraints
Total text
Examples
Input:
INFO:Start
WARN:Low disk
BAD LINE
ERROR:Oops
INFO:Done
Output:
2 1 1 1
Example Solution (Public)
<?php
$inputText=stream_get_contents(STDIN);
$inputLines=preg_split('/\\R/', $inputText);
$counts=['INFO'=>0,'WARN'=>0,'ERROR'=>0];
$invalid=0;
foreach($inputLines as $line){
$line=trim($line);
if($line==='') continue;
$colonPos=strpos($line,':');
if($colonPos===false || $colonPos===0){
$invalid++;
continue;
}
$level=substr($line,0,$colonPos);
if(isset($counts[$level])) $counts[$level]++;
else $invalid++;
}
echo $counts['INFO'].' '.$counts['WARN'].' '.$counts['ERROR'].' '.$invalid;
?>
Official Solution Code
<?php
$inputText=stream_get_contents(STDIN);
$inputLines=preg_split('/\\R/', $inputText);
$counts=['INFO'=>0,'WARN'=>0,'ERROR'=>0];
$invalid=0;
foreach($inputLines as $line){
$line=trim($line);
if($line==='') continue;
$colonPos=strpos($line,':');
if($colonPos===false || $colonPos===0){
$invalid++;
continue;
}
$level=substr($line,0,$colonPos);
if(isset($counts[$level])) $counts[$level]++;
else $invalid++;
}
echo $counts['INFO'].' '.$counts['WARN'].' '.$counts['ERROR'].' '.$invalid;
?>
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