10-03-2008
Quote:
filename[0] is the first character of the string. If the string is empty, the first character will be the terminator null byte.
C string-handling functions generally cannot read past a null byte. Your notation " ", `\0` is extremely non-standard, and seems to correspond to a string consisting of a space, followed by a null byte (which is usually not explicitly marked or required; it's the end of string, plain and simple). That string obviously has a length of one.
The C equality operator == does not compare strings in any meaningful way; you need to use a function such as strcmp. (I too thought this was shocking when I was learning C.) You can compare individual single characters (denoted by single quotes) one by one, which is what strcmp basically does in a loop over the strings it compares. Double quotes are used around strings (character arrays).
The C string tutorial which was already pointed out to you once probably explains all of this a lot better. Please read it.
Helo thx for replying me.
I completely agree with you but problem is that
one of my function in file is appening " " for some other functionality
so that If enter filename as blank it will give me filename
as filename = " ",`\0`
now tell me how I wan to check
if(filename = " ",`\0`)
then len = 0
how do I implement this
Regards,
Amit
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LEARN ABOUT PHP
ziparchive
ZIPARCHIVE(3) 1 ZIPARCHIVE(3)
The ZipArchive class
INTRODUCTION
A file archive, compressed with Zip.
CLASS SYNOPSIS
ZipArchive
ZipArchive
Properties
o
int$status
o
int$statusSys
o
int$numFiles
o
string$filename
o
string$comment
Methods
o
bool ZipArchive::addEmptyDir (string $dirname)
o
bool ZipArchive::addFile NULL (string $filename, [string $localname], [int $start], [int $length])
o
bool ZipArchive::addFromString (string $localname, string $contents)
o
bool ZipArchive::addGlob (string $pattern, [int $flags], [array $options = array()])
o
bool ZipArchive::addPattern (string $pattern, [string $path = "."], [array $options = array()])
o
bool ZipArchive::close (void )
o
bool ZipArchive::deleteIndex (int $index)
o
bool ZipArchive::deleteName (string $name)
o
bool ZipArchive::extractTo (string $destination, [mixed $entries])
o
string ZipArchive::getArchiveComment ([int $flags])
o
string ZipArchive::getCommentIndex (int $index, [int $flags])
o
string ZipArchive::getCommentName (string $name, [int $flags])
o
bool ZipArchive::GetExternalAttributesIndex (int $index, int &$opsys, int &$attr, [int $flags])
o
bool ZipArchive::getExternalAttributesName (string $name, int &$opsys, int &$attr, [int $flags])
o
string ZipArchive::getFromIndex (int $index, [int $length], [int $flags])
o
string ZipArchive::getFromName (string $name, [int $length], [int $flags])
o
string ZipArchive::getNameIndex (int $index, [int $flags])
o
string ZipArchive::getStatusString (void )
o
resource ZipArchive::getStream (string $name)
o
int ZipArchive::locateName (string $name, [int $flags])
o
mixed ZipArchive::open (string $filename, [int $flags])
o
bool ZipArchive::renameIndex (int $index, string $newname)
o
bool ZipArchive::renameName (string $name, string $newname)
o
bool ZipArchive::setArchiveComment (string $comment)
o
bool ZipArchive::setCommentIndex (int $index, string $comment)
o
bool ZipArchive::setCommentName (string $name, string $comment)
o
bool ZipArchive::setExternalAttributesIndex (int $index, int $opsys, int $attr, [int $flags])
o
bool ZipArchive::setExternalAttributesName (string $name, int $opsys, int $attr, [int $flags])
o public bool ZipArchive::setPassword (string $password)
o
array ZipArchive::statIndex (int $index, [int $flags])
o
array ZipArchive::statName (string $name, [int $flags])
o
bool ZipArchive::unchangeAll (void )
o
bool ZipArchive::unchangeArchive (void )
o
bool ZipArchive::unchangeIndex (int $index)
o
bool ZipArchive::unchangeName (string $name)
PROPERTIES
o $status
-Status of the Zip Archive
o $statusSys
-System status of the Zip Archive
o $numFiles
-Number of files in archive
o $filename
-File name in the file system
o $comment
-Comment for the archive
PHP Documentation Group ZIPARCHIVE(3)