WMPRO, WMMINI FW >= 1.0 WMMEGA FW >= 2.0

Check if a file exists

Return 1 (true) if the file exists, otherwise return 0 (false)

filename: Full path and file name to check

1 if file exists, 0 if file does not exist

Example #1 - Simple existence report:

<pre><?
if (file_exists("/test.txt")) {
  print("File exists.");
} else {
  print("File does not exist!");
}
?></pre>

Example #2 - Create a new file with a unique non-conflicting filename (this example is extracted from the Wattmon OS “/scripts/logrotate.cgi”):

<?
$date=strftime("/logs/log%Y%m%d.txt",time()); //desired filename, but it may already exist
$cnt=0;
while (file_exists($date)) {
  $date=strftime("/logs/log%Y%m%d-".$cnt.".txt",time()); //unique non-conflicting filename
  $cnt++;
}
$st="/logs/log.txt";
if (file_exists($st)) {
  $res=rename($st,$date);
  if ($res==0) $_GLOBALS['sysmsg']="Log file rotated to ".$date;
  log("New logfile created after logrotate called.");
} else {
  $_GLOBALS['sysmsg']="Unable to rotate, log file doesnt exist";
}
print("{\"status\":1,\"msg\":\"".$_GLOBALS['sysmsg']."\"}");
?>

findfirst() - Start searching the current folder for files matching a pattern and attributes

strftime() - Format the passed time using the format string

time() - Return the current system timestamp

rename() - Rename or move a file from source to destination

log() - Print to the System Log

if - Flow control structure for conditional execution

while - Flow control structure for a conditional loop

uphp_special_variables - Special arrays that are populated automatically (including $_GLOBALS)