| strpos() before str_replace()? Or, maybe strtr()? [message #184918] |
Sun, 16 February 2014 09:49  |
jwcarlton
Messages: 76
Registered: December 2010
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Member |
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I know that I'm talking about microseconds here, so this is really just for the sake of furthering my own education.
I'm looping through roughly 100,000 values:
$userArr = array(
"something" => "anything",
...
);
foreach ($userArr as $key => $val) {
$firstname = str_replace($key, "****", $firstname);
$lastname = str_replace($key, "****", $lastname);
}
Both $firstname AND $lastname could contain any of the keys, but could only potentially contain one key each. It's likely, though, that neither will contain any of the keys.
Would it be faster to use strpos() before each str_replace(), like so?:
foreach ($userArr as $key => $val) {
if (strpos($firstname, $key) !== false)
$firstname = str_replace($key, "****", $firstname);
if (strpos($lastname, $key) !== false)
$lastname = str_replace($key, "****", $lastname);
}
My instinct is that it would be the same, if not marginally slower; allowing a potential computation time for 100,002 strpos() as opposed to 100,000 str_replace().
Or, would strtr() be faster? I've never actually used this function in practice; I think it's a slow function, but have never tested it, and don't remember where I read that:
$firstname = strtr($firstname, $userArr);
$lastname = strtr($lastname, $userArr);
Any other suggestions on what might be the fastest option?
TIA,
Jason
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