Test: Last Character

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Result: Discarded

The test labeled "substr()" was the faster by 0.0299 seconds, (5.395% faster)

substr() 100%

$str[] 94.605%

The substr() test took 0.525 seconds.
The $str[] test took 0.555 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 140,665 loops for a total of 2,813,300 runs.

Line execution difference (0.000011) milliseconds.
Avg difference (1.497) milliseconds per 140,665 loops.
Total difference 29.94 milliseconds for 2,813,300 loops

The iteration variablity for Code 1 was (1.4662) milliseconds and Code 2 was (3.0048) milliseconds. The lower and the closer together there values are the more accurate the results are.

Code

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

for ($j = 0; $j < 1000; $j++)
	$GLOBALS['dummy2'] = substr($GLOBALS['dummy'], -1);

The second test, "$str[]", was:

for ($j = 0; $j < 1000; $j++)
	$GLOBALS['dummy2'] = $GLOBALS['dummy'][strlen($GLOBALS['dummy'])-1];

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