preg_match

Myrkul

Alright I read the manual.. and various posts on this forum.. i am still a little confused about the function.

I have a field that contains a URL to an image (well it should) and i need to preg_match this to assure it is.. i figured i could check for .jpg, .gif etc.. all ive seen is how to find/replace strings in pages..

ir4z0r

what about using simple string functions?

if (substr($path,strlen($path)-4,4) == '.jpg) echo "ok";

Myrkul

and i could enter more than one thing with:
if (substr($path,strlen($path)-4,4) == '.jpg', '.gif', 'jpeg' )

correct?

WinterDragon

actually it would be

if (substr($path,strlen($path)-4,4) == '.jpg' OR '.gif' OR '.pmg') {
echo "Something.<br>";
}

but you might need || and not OR shrugs

Myrkul

//Check image URL
if (substr($row['image'],strlen($row['image'])-4,4) == 'tripod' || 'geocities' || 'angelfire') { 
	$image = "Not valid for displaying - <a href=\"$row['image']\">Link</a>"; 
} else if (substr($row['image'],strlen($row['image'])-4,4) == '.jpg' || '.gif' || '.png' || '.jpeg') { 
	$image = "<img src=\"$row['image']\" border=\"0\" width=\"270\" height=\"198\">";
} else {
	$image = "$row['image']";
}

Alright I get this error:
"Parse error: parse error, expecting T_STRING' orT_VARIABLE' or `T_NUM_STRING' in /home/path/to/me/view2.php on line 55"

line 55 is

	$image = "Not valid for displaying - <a href=\"$row['image']\">Link</a>";

ir4z0r

$image = "Not valid for displaying - <a href=\"" . $row['image'] . "\">Link</a>";

maybe this way, but sth the original error occurs some lines above

a word to the other thing: the OR would probably work, but not as expected
PHP takes everything except 0, false, "" as FALSE, so ".jpg" would be TRUE

hence, if ($var == "bla" || "bla2" || "bla3") ... would be ALWAYS TRUE

my suggestion:

$end = substr($path,strlen($path)-4,4);
if (($end == '.jpg') || ($end == '.png') || ($end == '.gif')) echo "ok";

btw. the substr thingie gets the last 4 letters, so the 'angelfire' comparison doesn't work