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<?php function uppercase(Traversable $in) { foreach ($in as $word) { yield strtoupper($word); } } function reverse(Traversable $in) { foreach ($in as $word) { yield strrev($word); } } function each_println(Traversable $in) { foreach ($in as $line) { echo "$line\n"; } } function allAbove(Traversable $in) { foreach($in as $word) { yield array('upper' => strtoupper($word), 'rev' => strrev($word), 'combined' => strrev(strtoupper($word))); } } each_println(reverse(uppercase(new ArrayIterator(["foo", "bar", "baz"])))); foreach(allAbove(new ArrayIterator(["foo", "bar", "baz"])) as $item) { each_println($item); }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
OOF RAB ZAB Fatal error: Uncaught TypeError: each_println(): Argument #1 ($in) must be of type Traversable, array given, called in /in/8SsLI on line 33 and defined in /in/8SsLI:17 Stack trace: #0 /in/8SsLI(33): each_println(Array) #1 {main} thrown in /in/8SsLI on line 17
Process exited with code 255.
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
OOF RAB ZAB Fatal error: Uncaught TypeError: Argument 1 passed to each_println() must implement interface Traversable, array given, called in /in/8SsLI on line 33 and defined in /in/8SsLI:17 Stack trace: #0 /in/8SsLI(33): each_println(Array) #1 {main} thrown in /in/8SsLI on line 17
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
OOF RAB ZAB Catchable fatal error: Argument 1 passed to each_println() must implement interface Traversable, array given, called in /in/8SsLI on line 33 and defined in /in/8SsLI on line 17
Process exited with code 255.
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected 'strtoupper' (T_STRING) in /in/8SsLI on line 6
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected T_STRING in /in/8SsLI on line 6
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_STRING in /in/8SsLI on line 6
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting ')' in /in/8SsLI on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting ')' in /in/8SsLI on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/8SsLI on line 3
Process exited with code 255.
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