Test: stripos vs. strtolower(substr)

Case insensitive search a string for a set of characters.

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Result: Discarded

The test labeled "stripos()" was the faster by 0.034 seconds, (4.616% faster)

stripos() 100%

strtolower(substr()) 95.384%

The stripos() test took 0.7032 seconds.
The strtolower(substr()) test took 0.7372 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 146,334 loops for a total of 2,926,680 runs.

Line execution difference (0.000012) milliseconds.
Avg difference (1.702) milliseconds per 146,334 loops.
Total difference 34.03 milliseconds for 2,926,680 loops

The iteration variablity for Code 1 was (7.2536) milliseconds and Code 2 was (7.8124) milliseconds. The lower and the closer together there values are the more accurate the results are.

Code

The first test, "stripos()", was:

for ($j = 0; $j < 100; $j++)
	$GLOBALS['dummy2'] = stripos($GLOBALS['dummy'], 'xyz') != '';

The second test, "strtolower(substr())", was:

for ($j = 0; $j < 100; $j++)
	$GLOBALS['dummy2'] = strtolower(substr($GLOBALS['dummy'], 24, 4) == 'xyz');

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