(PHP 5 >= 5.1.0, PHP 7, PHP 8)
The SplFileObject class offers an object-oriented interface for a file.
$filename,$mode = "r",$useIncludePath = false ,$context = null $separator = ",", string $enclosure = "\"", string $escape = "\\"): array |false $fields,$separator = ",",$enclosure = "\"",$escape = "\\",$eol = "\n"$separator = ",", string $enclosure = "\"", string $escape = "\\"): void $mode = "r", bool $useIncludePath = false , ? resource $context = null ): SplFileObject SplFileObject::DROP_NEW_LINE Drop newlines at the end of a line.
SplFileObject::READ_AHEAD Read on rewind/next.
SplFileObject::SKIP_EMPTY Skips empty lines in the file. This requires the READ_AHEAD flag be enabled, to work as expected.
SplFileObject::READ_CSV Read lines as CSV rows.
Note that this class has a private (and thus, not documented) property that holds the file pointer. Combine this with the fact that there is no method to close the file handle, and you get into situations where you are not able to delete the file with unlink(), etc., because an SplFileObject still has a handle open.
To get around this issue, delete the SplFileObject like this:
---------------------------------------------------------------------
<?php
print "Declaring file object\n";
$file = new SplFileObject('example.txt');
print "Trying to delete file...\n";
unlink('example.txt');
print "Closing file object\n";
$file = null;
print "Deleting file...\n";
unlink('example.txt');
print 'File deleted!';
?>
---------------------------------------------------------------------
which will output:
---------------------------------------------------------------------
Declaring file object
Trying to delete file...
Warning: unlink(example.txt): Permission denied in file.php on line 6
Closing file object
Deleting file...
File deleted!
---------------------------------------------------------------------If you want to skip blank lines when reading a CSV file, you need *all * the flags:
$file->setFlags(SplFileObject::READ_CSV | SplFileObject::READ_AHEAD | SplFileObject::SKIP_EMPTY | SplFileObject::DROP_NEW_LINE);with php 8.3, with or without SplFileObject::DROP_NEW_LINE, you get an array with empty values at the end.Complimenting marcus at synchromedia dot co dot uk comment, you can also do something like this:
<?php
// create a SplFileObject for reading - note that there are no flags
$file = new SplFileObject('/path/to/file', 'r');
// iterate over its contents
while (!$file->eof()) {
// get the current line
$line = $file->fgets();
// trim it, and then check if its empty
if (empty(trim($line))) {
// skips the current iteration
continue;
}
}
While this may seem like a overkill for such thing, it allows you to do some processing with the empty lines that might come (I had to do this mostly because I needed to count empty lines instead of just skipping them). Since it also trims the line before checking if it's empty, you won't get lines composed only of empty spaces (I don't know if the flags also make it trim the content before checking it).