I want to create a directory if it does not exist already.
Is using the is_dir function enough for that purpose?
if ( !is_dir( $dir ) ) {
mkdir( $dir );
}
Or should I combine is_dir with file_exists?
if ( !file_exists( $dir ) && !is_dir( $dir ) ) {
mkdir( $dir );
}
Here's what worked best for me when trying to script this (in case anyone else comes across this like I did):
$ pecl -d php_suffix=5.6 install <package>
$ pecl uninstall -r <package>
$ pecl -d php_suffix=7.0 install <package>
$ pecl uninstall -r <package>
$ pecl -d php_suffix=7.1 install <package>
$ pecl uninstall -r <package>
The -d php_suffix=<version> piece allows you to set config values at run time vs pre-setting them with pecl config-set. The uninstall -r bit does not actually uninstall it (from the docs):
vagrant@homestead:~$ pecl help uninstall
pecl uninstall [options] [channel/]<package> ...
Uninstalls one or more PEAR packages. More than one package may be
specified at once. Prefix with channel name to uninstall from a
channel not in your default channel (pecl.php.net)
Options:
...
-r, --register-only
do not remove files, only register the packages as not installed
...
The uninstall line is necessary otherwise installing it will remove any previously installed version, even if it was for a different PHP version (ex: Installing an extension for PHP 7.0 would remove the 5.6 version if the package was still registered as installed).
You can use opendir() and check if ENOENT == errno on failure:
#include <dirent.h>
#include <errno.h>
DIR* dir = opendir("mydir");
if (dir) {
/* Directory exists. */
closedir(dir);
} else if (ENOENT == errno) {
/* Directory does not exist. */
} else {
/* opendir() failed for some other reason. */
}
CREATE TABLE ResultSet (Directory varchar(200))
INSERT INTO ResultSet
EXEC master.dbo.xp_subdirs 'c:'
Select * FROM ResultSet where Directory = 'testing'
Will return a list of sub directories, you can then check the contents of the list.
Never used any of those, but they look interesting..
Take a look at Gearman as well.. more overhead in systems like these but you get other cool stuff :) Guess it depends on your needs ..
Both would return true on Unix systems - in Unix everything is a file, including directories. But to test if that name is taken, you should check both. There might be a regular file named 'foo', which would prevent you from creating a directory name 'foo'.