Test: Last Character

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Result: Discarded

The test labeled "$str[]" was the faster by 0.0221 seconds, (1.926% faster)

$str[] 100%

substr() 98.074%

The $str[] test took 1.1244 seconds.
The substr() test took 1.1464 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 288,665 loops for a total of 5,773,300 runs.

Line execution difference (0.000004) milliseconds.
Avg difference (1.104) milliseconds per 288,665 loops.
Total difference 22.08 milliseconds for 5,773,300 loops

The iteration variablity for Code 1 was (7.1624) milliseconds and Code 2 was (4.6671) 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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