0
1
Mitul Dabhi
answered Nov 30 '-1 00:00
use pathinfo function to get metadata(info about the file) of file
$file='display.txt';
$fileinfo=pathinfo($file);
if($fileinfo['extension']=='txt'){
echo file_get_contents($file);
}
or you can use
$file='display.txt';
$fileext=pathinfo($file,PATHINFO_EXTENSION );
if($fileext=='txt'){
echo file_get_contents($file);
}
function pathinfo give you array contain with directory,basename(filename with extension),extension and filename with out exension
$file='www/display.txt';
$fileinfo=pathinfo($file);
print_r($fileinfo);
give you output
Array ( [dirname] => www [basename] => display.txt [extension] => txt [filename] => display )
function pathinfo should have first argument filename and second will be option of output . you can pass second argument one of PATHINFO_DIRNAME, PATHINFO_BASENAME, PATHINFO_EXTENSION or PATHINFO_FILENAME.
if you pass PATHINFO_EXTENSION second argument in pathinfo function you will get extension as string not array
so
$file='www/display.txt';
$fileinfo=pathinfo($file,PATHINFO_EXTENSION );
echo($fileinfo);
give you output
txt
pathinfo($path,4);also return extension PATHINFO_EXTENSION is equal to 4
-
Phpworker
Oct 21 '16 13:52
1
shyam
answered Nov 30 '-1 00:00
to get file extension from filename at PHP . you can use strpos and substr to get file extension as well
$file='file.txt';
$start= strpos($file,".");
echo substr($file, $start );
start to find the string from "." by substr .
if you have filename with two dot , than also it works and find the file extension from filename for PHP
$file='file.tar.giz';
$start= strpos($file,".");
echo substr($file, $start );
0
Mahesh Radadiya
answered Nov 30 '-1 00:00
pathinfo is not good to use get extension
suppose if you have path contain two or more dot (.) than expected result will raise
$file="www/data.tar.giz";
echo pathinfo($file,PATHINFO_EXTENSION );// will result "giz"
so i suggest another function
$file="www/data.tar.giz";
echo $extension = substr($file,strpos($file, ".")+1, strlen($file));// will result "tar.giz"
if you want only last extension like giz
$file="www/data.tar.giz";
echo $extension = substr(strrchr($file, "."), 1);// will result "giz"
its very fast and good to use