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· #1 while ($awake){ code(); }
Name: Eric
Location: Kentucky
Join Date: Mar 2005
Posts: 4,046
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Check if a URL exists.
Howdy.
This simple function will check if a url is valid (going by parse_url()) and if it's 'online' - by seeing if it returns a 302, 301, or 200 status code.
EDIT: 3/4/2008, updated to more efficient.
PHP Code:
<?php
function is_valid_url ( $url )
$url = @ parse_url ( $url );
$url )
false ;
$url = array_map ( 'trim' , $url );
$url [ 'port' ] = (!isset( $url [ 'port' ])) ? 80 : (int) $url [ 'port' ];
$path = (isset( $url [ 'path' ])) ? $url [ 'path' ] : '/' ;
$path .= (isset( $url [ 'query' ])) ? "?$url[query]" : '' ;
$url [ 'host' ]) AND $url [ 'host' ] != gethostbyname ( $url [ 'host' ]))
PHP_VERSION >= 5 )
$headers = implode ( '' , get_headers ( "$url[scheme]://$url[host]:$url[port]$path" ));
$fp = fsockopen ( $url [ 'host' ], $url [ 'port' ], $errno , $errstr , 30 );
$fp )
false ;
fputs ( $fp , "HEAD $path HTTP/1.1\r\nHost: $url[host]\r\n\r\n" );
$headers = fread ( $fp , 4096 );
fclose ( $fp );
preg_match ( '#^HTTP/.*\s+[(200|301|302)]+\s#i' , $headers );
false ;
?>
Last edited by SecondVersion : 03-04-2008 at 05:29 PM .
· #2 NamePros Regular
Name: Bobby Eubank
Join Date: Jun 2005
Posts: 777
NP$: 130.25 (
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I needed this a little while ago, and here is what I have:
PHP Code:
function url_exists ( $url ) {
$headers = get_headers ( $url );
preg_match ( '/^HTTP\/\d\.\d\s+(200|301|302)/' , $headers [ 0 ]);
then use:
if ($headers[0] == 1) {
code
}
__________________
· #3 while ($awake){ code(); }
Name: Eric
Location: Kentucky
Join Date: Mar 2005
Posts: 4,046
NP$: 1958.00 (
Donate )
Originally Posted by bobby9101 I needed this a little while ago, and here is what I have:
PHP Code:
function url_exists ( $url ) {
$headers = get_headers ( $url );
preg_match ( '/^HTTP\/\d\.\d\s+(200|301|302)/' , $headers [ 0 ]);
then use:
if ($headers[0] == 1) {
code
}
Not everyone has PHP5
· #4 while ($awake){ code(); }
Name: Eric
Location: Kentucky
Join Date: Mar 2005
Posts: 4,046
NP$: 1958.00 (
Donate )
Updated the code, check first post.
· #5 NamePros Regular
Name: Steven
Join Date: Feb 2005
Posts: 469
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Originally Posted by SecondVersion Updated the code, check first post.
I don't get it, how to use that code above? sorry, im a newbie with php
· #6 Senior Member
Name: Dennis
Location: Joliet, Illinois
Join Date: Apr 2005
Posts: 1,100
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Originally Posted by abcde I don't get it, how to use that code above? sorry, im a newbie with php
First, you need a webhost which supports PHP or to install it on your own PC. But on your own PC you need to also install a webserver and it's a real hassle so it's easier to have a webhost with this.
Then, input this script in to a file called file.php (or whatever_you_want.php) and save and close the file.
Now in SecondVersion's script he created the function called $is_valid_url($url); so what you'll want to do to see if a URL exists: (within the same file that the function is in [or if it's included for that matter])
PHP Code:
<?php
// Test script. Function created by SecondVersion
function is_valid_url ( $url )
$url = @ parse_url ( $url );
$url )
false ;
$url = array_map ( 'trim' , $url );
$url [ 'port' ] = (!isset( $url [ 'port' ])) ? 80 : (int) $url [ 'port' ];
$path = (isset( $url [ 'path' ])) ? $url [ 'path' ] : '/' ;
$path .= (isset( $url [ 'query' ])) ? "?$url[query]" : '' ;
$url [ 'host' ]) AND $url [ 'host' ] != gethostbyname ( $url [ 'host' ]))
PHP_VERSION >= 5 )
$headers = implode ( '' , get_headers ( "$url[scheme]://$url[host]:$url[port]$path" ));
$fp = fsockopen ( $url [ 'host' ], $url [ 'port' ], $errno , $errstr , 30 );
$fp )
false ;
fputs ( $fp , "HEAD $path HTTP/1.1\r\nHost: $url[host]\r\n\r\n" );
$headers = fread ( $fp , 4096 );
fclose ( $fp );
preg_match ( '#^HTTP/.*\s+[(200|301|302)]+\s#i' , $headers );
false ;
is_valid_url ( "http://namepros.com" ))
"w00t for Namepros.com! It's alive!" );
"Oh no! Where did NamePros go!?! :(" );
?>
-RageD
· #7 while ($awake){ code(); }
Name: Eric
Location: Kentucky
Join Date: Mar 2005
Posts: 4,046
NP$: 1958.00 (
Donate )
Thanks for answering that for me, RageD.
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