Php chmod function chmod
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chmod
Attempts to change the mode of the specified file to that given in permissions .
Parameters
Note that permissions is not automatically assumed to be an octal value, so to ensure the expected operation, you need to prefix permissions with a zero (0). Strings such as «g+w» will not work properly.
chmod ( «/somedir/somefile» , 755 ); // decimal; probably incorrect
chmod ( «/somedir/somefile» , «u+rwx,go+rx» ); // string; incorrect
chmod ( «/somedir/somefile» , 0755 ); // octal; correct value of mode
?>
The permissions parameter consists of three octal number components specifying access restrictions for the owner, the user group in which the owner is in, and to everybody else in this order. One component can be computed by adding up the needed permissions for that target user base. Number 1 means that you grant execute rights, number 2 means that you make the file writeable, number 4 means that you make the file readable. Add up these numbers to specify needed rights. You can also read more about modes on Unix systems with ‘man 1 chmod‘ and ‘man 2 chmod‘.
// Read and write for owner, nothing for everybody else
chmod ( «/somedir/somefile» , 0600 );
// Read and write for owner, read for everybody else
chmod ( «/somedir/somefile» , 0644 );
// Everything for owner, read and execute for others
chmod ( «/somedir/somefile» , 0755 );
// Everything for owner, read and execute for owner’s group
chmod ( «/somedir/somefile» , 0750 );
?>
Return Values
Returns true on success or false on failure.
Errors/Exceptions
Upon failure, an E_WARNING is emitted.
Notes
Note:
The current user is the user under which PHP runs. It is probably not the same user you use for normal shell or FTP access. The mode can be changed only by user who owns the file on most systems.
Note: This function will not work on remote files as the file to be examined must be accessible via the server’s filesystem.
See Also
- chown() — Changes file owner
- chgrp() — Changes file group
- fileperms() — Gets file permissions
- stat() — Gives information about a file
chmod
Attempts to change the mode of the specified file to that given in permissions .
Parameters
Note that permissions is not automatically assumed to be an octal value, so to ensure the expected operation, you need to prefix permissions with a zero (0). Strings such as «g+w» will not work properly.
chmod("/somedir/somefile", 755); // decimal; probably incorrect chmod("/somedir/somefile", "u+rwx,go+rx"); // string; incorrect chmod("/somedir/somefile", 0755); // octal; correct value of mode ?> The permissions parameter consists of three octal number components specifying access restrictions for the owner, the user group in which the owner is in, and to everybody else in this order. One component can be computed by adding up the needed permissions for that target user base. Number 1 means that you grant execute rights, number 2 means that you make the file writeable, number 4 means that you make the file readable. Add up these numbers to specify needed rights. You can also read more about modes on Unix systems with ‘man 1 chmod‘ and ‘man 2 chmod‘.
// Read and write for owner, nothing for everybody else chmod("/somedir/somefile", 0600); // Read and write for owner, read for everybody else chmod("/somedir/somefile", 0644); // Everything for owner, read and execute for others chmod("/somedir/somefile", 0755); // Everything for owner, read and execute for owner's group chmod("/somedir/somefile", 0750); ?> Return Values
Returns true on success or false on failure.
Errors/Exceptions
Upon failure, an E_WARNING is emitted.
Notes
Note:
The current user is the user under which PHP runs. It is probably not the same user you use for normal shell or FTP access. The mode can be changed only by user who owns the file on most systems.
Note: This function will not work on remote files as the file to be examined must be accessible via the server’s filesystem.
See Also
- chown() — Changes file owner
- chgrp() — Changes file group
- fileperms() — Gets file permissions
- stat() — Gives information about a file
PHP 8.2
(PHP 4, 5, 7, 8) checkdnsrr records corresponding to a given Internet host name IP address Searches DNS for records of type corresponding to hostname.
(PHP 4, 5, 7, 8) chgrp Changes file group Attempts to change the group of file filename Only the superuser may change group of file arbitrarily; other
(PHP 4, 5, 7, 8) chown Changes file owner Attempts to change the owner of file filename user Path to the file.