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 0.0062 seconds, (0.961% faster)

stripos() 100%

strtolower(substr()) 99.039%

The stripos() test took 0.6399 seconds.
The strtolower(substr()) test took 0.6461 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 143,812 loops for a total of 2,876,240 runs.

Line execution difference (0.000002) milliseconds.
Avg difference (0.311) milliseconds per 143,812 loops.
Total difference 6.21 milliseconds for 2,876,240 loops

The iteration variablity for Code 1 was (5.1204) milliseconds and Code 2 was (3.5022) 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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