<?php
//trace
$backtrace = isset($error['backtrace']) ? $error['backtrace'] : debug_backtrace(DEBUG_BACKTRACE);
list($callerFile, $callerLine, $traceTable) = backtraceFormat($backtrace);
if (empty($error['file']) && $callerFile && $callerLine) {
    $error['file'] = $callerFile;
    $error['line'] = $callerLine;
}
$contents = "";
$contents .= "\r\n==============================================\r\n";
$contents .= "文件: " . relDIr($error['file']) . "\r\n";
$contents .= "行: " . $error['line'] . "\r\n";
$contents .= $error['message'];
$contents .= "\r\n----------------------------------------------\r\n";
return $contents;