Typical PHP codes
example for URL:
http://example.com/folder1/folder2/yourfile.php?var=blabla#12345
$_SERVER["DOCUMENT_ROOT"] === /home/user/public_html
$_SERVER["SERVER_ADDR"] === 143.34.112.23
$_SERVER['HTTP_HOST'] === example.com (or with WWW)
$_SERVER["REQUEST_URI"] === /folder1/folder2/yourfile.php?var=blabla
__FILE__ === /home/user/public_html/folder1/folder2/yourfile.php
basename(__FILE__) === yourfile.php
__DIR__ === /home/user/public_html/folder1/folder2 [same: dirname(__FILE__)]
$_SERVER["QUERY_STRING"] === var=blabla
$_SERVER["REQUEST_URI"] === /folder1/folder2/yourfile.php?var=blabla
parse_url($_SERVER["REQUEST_URI"], PHP_URL_PATH) === /folder1/folder2/yourfile.php
$_SERVER["PHP_SELF"] === /folder1/folder2/yourfile.php
//if "YOURFILE.php" is included in "PARENTFILE.php" , and "PARENTFILE.PHP?abc" is opened:
$_SERVER["PHP_SELF"] === /parentfile.php
$_SERVER["REQUEST_URI"] === /parentfile.php?abc
$_SERVER["SCRIPT_FILENAME"]=== /home/user/public_html/parentfile.php
str_replace($_SERVER["DOCUMENT_ROOT"],'', str_replace('\\','/',__FILE__ ) ) === /folder1/folder2/yourfile.php
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