Explode and preg_split...........?

i have 1000+ emails separated with commas, so i need to split them.., but i have one simple doubt...!!!

we have explode and preg_split, which is best.., i believe both are same

$res = explode(' , ', $emails)

or

$res = preg_split('/\s*,\s*/', $email);

PHP:

And may i know preg_split have ' \s*,\s* ' but explode have nothing...!!!
Would be greatful to your help..!!!!

 

explode() is indefinitely better in this situation because it costs less. preg_split is a regular expression function which will spend extra server resources to parse the regexp string you have provided, namely '/\s*,\s*/'.

 

My guess would be explode, but before you commit one way or the other, you might want to think about taking a bit of time and try out both methods using timers, allowing you to make a reasoned decision based on performance metrics given your situation and not merely speculation.

 

i didn't get any good reply...!!!!!!!!

 

$res = explode(' , ', $emails)

PHP:

^ Explode would match (space)(comma)(space)

$res = preg_split('/\s*,\s*/', $emails);

PHP:

^ Whereas the above preg_split() would match (new-line)(comma)(new-line)

New-line as in any new-line/whitespace character (space, \n, \r\n, \t)


So the best option out of the two in your scenario would be, are you wanting to match new-line(s) then go for the preg_replace(), or if your just wanting to match space(s) then go for the explode().

 

Ohh kk thanks friend...., thanks a lot.

but one more doubt..., what \s*,\s* means in preg

 

But danx,

$string = 'one  ok  ,  two,three,     four  , five,six seven';
$array = preg_split("/\s*,\s*/", $string); 
print_r($array);

PHP:

and

$string = 'one  ok  ,  two,three,     four  , five,six seven';
$array = preg_split("/,/", $string); 
print_r($array);

PHP:

Giving the same out put,

Array ( [0] => one ok [1] => two [2] => three [3] => four [4] => five [5] => six seven )

then what is the necessary of \s*,\s*, would be grateful about your help..!!