explode undefined offset check?

[a.mlw.walker]

I am getting an undefined offset when using an explode. Usually it works however on one instance it fails. It is the second explode here that is failing, because there was no instance of " v " in the first one:

$pieces = explode(" v ", strip_tags($matches[$gameKeys[$e]]));	
echo $pieces[1]."<p>";
$findtime = explode(",", $pieces[1]);
print_r($findtime);
produces:

Tunisia, GpC, 19:00

 

Array ( [0] => Tunisia [1] => GpC [2] => 19:00 )

 

 

Notice: Undefined offset: 1 in C:\xampp\htdocs\load_data.php on line 82

 

Notice: Undefined offset: 1 in C:\xampp\htdocs\load_data.php on line 83

Array ( [0] => )

 

Crystal Palace, (agg 0-1), SF, L2, 19:45

Array ( [0] => Crystal Palace [1] => (agg 0-1) [2] => SF [3] => L2 [4] => 19:45 )

So it works on the one above and below, however one of them seems to have nothing in it, and therefore pops up an error. This won't always be the case, but sometimes this might occur. The data it is reading from shows this:

 

Morocco v Tunisia, GpC, 19:00

Qatar OFF Sweden, 13:00

Cardiff v Crystal Palace, (agg 0-1), SF, L2, 19:45

 

So you can see the Qatar one is of slightly different format - it says OFF instead of " v ". Can i run an if statement on the first one. So if there was a " v " then do the next else have something that will avoid the error occuring?

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[AyKay47]

because if there isn't a "v" in $matches[$gameKeys[$e]], $pieces will not hold an array, and using $pieces[1] will be invalid.

[a.mlw.walker]

So is there a way to check whether calling the fucntion explode returns succesful rather than generating an error?

[AyKay47]

what you can do is to check for $pieces being an array.

 

$pieces = explode(" v ", strip_tags($matches[$gameKeys[$e]]));
if(is_array($pieces)) {
   echo $pieces[1]."<p>";
   $findtime = explode(",", $pieces[1]);
   print_r($findtime);
}else {
   echo $pieces;
}	

[a.mlw.walker]

That is a nice proposal, however i think merely calling explode forces pieces into an array, because even if there is no " v " it still thinks pieces is an array because if I do

$pieces = explode(" v ", strip_tags($matches[$gameKeys[$e]]));
echo "<p>pieces = ". $pieces;

It returns:

pieces = Array

[Pikachu2000]

Yes, explode normally returns an array. If the delimiter isn't present in the string, the array will have only one element. That behavior is documented in the manual entry.

[a.mlw.walker]

So is there no way for me to know whether the explode was succesful in terms of whether it found the delimiter and "exploded" it?

Ah I used a strpos.

Thanks

[AyKay47]

That is a nice proposal, however i think merely calling explode forces pieces into an array, because even if there is no " v " it still thinks pieces is an array because if I do

$pieces = explode(" v ", strip_tags($matches[$gameKeys[$e]]));
echo "<p>pieces = ". $pieces;

It returns:

pieces = Array

yeah, sorry, not really sure why I did that, here is the revised code.

 

$pieces = explode(" v ", strip_tags($matches[$gameKeys[$e]]));
if(array_key_exists(1,$pieces)) {
   echo $pieces[1]."<p>";
   $findtime = explode(",", $pieces[1]);
   print_r($findtime);
}else {
   echo $pieces[0];
}