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<?php function xrange($start, $limit, $step = 1) { if ($start < $limit) { if ($step <= 0) { throw new LogicException('Step must be +ve'); } for ($i = $start; $i <= $limit; $i += $step) { yield $i; } } else { if ($step >= 0) { throw new LogicException('Step must be -ve'); } for ($i = $start; $i >= $limit; $i += $step) { yield $i; } } } /* * Note that both range() and xrange() result in the same * output below. */ echo 'Single digit odd numbers from range(): '; foreach (range(1, 9, 0) as $number) { echo "$number "; } echo "\n";
Output for git.master, git.master_jit, rfc.property-hooks
Single digit odd numbers from range(): Fatal error: Uncaught ValueError: range(): Argument #3 ($step) must not exceed the specified range in /in/VgeSh:29 Stack trace: #0 /in/VgeSh(29): range(1, 9, 0) #1 {main} thrown in /in/VgeSh on line 29
Process exited with code 255.

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