02.ErrorLogger

<?php
$errorLog = $_GET['errorLog'];
preg_match_all('/Exception in thread \"[A-Za-z_.]+\"\s*java\.(.)+[A-Za-z]+\: [0-9]+\s*at [A-Za-z_.]+\.[A-Za-z]+\([A-Za-z_]+\.[A-Za-z]+\:[0-9]+\)/', $errorLog, $lines);

$lineNumberArr = [];
$methodArr = [];
$fileNameArr = [];
$exceptionsArr = [];
foreach ($lines[0] as $line) {
    preg_match('/[0-9]+\)/', $line, $lineNumberArr[]);
    preg_match('/[A-Za-z_]+\(/', $line, $methodArr[]);
    preg_match('/\([A-Za-z_]+\.[A-Za-z]+/', $line, $fileNameArr[]);
    preg_match('/\.[A-Za-z]+\:/', $line, $exceptionsArr[]);
}

// clear all the brackets from the entries
$fileNames = [];
foreach ($fileNameArr as $entry) {
    foreach ($entry as $name) {
        $fileNames[] = substr($name, 1, strlen($name));
    }
}
// clear all the brackets from the entries
$exceptions = [];
foreach ($exceptionsArr as $line) {
    foreach ($line as $str) {
        $exceptions[] = substr($str, 1, strlen($str) - 2);
    }
}
// clear all the brackets from the entries
$lineNum = [];
foreach ($lineNumberArr as $entry) {
    foreach ($entry as $number) {
        $lineNum[] = substr($number, 0, strlen($number) - 1);
    }
}
// clear all the brackets from the entries
$method= [];
foreach ($methodArr as $entry) {
    foreach ($entry as $name) {
        $method[] = substr($name, 0, strlen($name) - 1);
    }
}

$output = "<ul>";

for ($i = 0; $i <count($lines[0]); $i++) {
    $output .= "<li>line ";
    $output .= "<strong>" . htmlspecialchars($lineNum[$i]) . "</strong> - ";
    $output .= "<strong>" . htmlspecialchars($exceptions[$i]) . "</strong> in ";
    $output .= "<em>" . htmlspecialchars($fileNames[$i]) . ":" . htmlspecialchars($method[$i]) . "</em></li>";
}

$output .= "</ul>";
echo $output;