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<?php //Simple math class class Staircase { function __construct($numberOfSteps) { $this->numberOfSteps = $numberOfSteps; } //Returns a closure function buildingNumberOfSteps() { //We can't directly use $this inside closure $thisCopy = $this; return function($storeysNumber) use ($thisCopy) { return $storeysNumber*$thisCopy->numberOfSteps; }; } function buildingNumberOfStepsIncludingBasement() { return function($storeysNumber) { return ($storeysNumber + 1)*$this->numberOfSteps; }; } } $staircase = new Staircase(25); $numberOfStepsToReachRoofTopFromGround = $staircase->buildingNumberOfSteps(); $numberOfStepsToReachRoofTopFromBasement = $staircase->buildingNumberOfStepsIncludingBasement(); echo "5.3 <= PHP < 5.4 only allows me to climb from the ground... the ".$numberOfStepsToReachRoofTopFromGround(5)." steps :( ... "; echo "but with PHP >= 5.4 I can make my way from the basement to the top, climbing the ".$numberOfStepsToReachRoofTopFromBasement(5)." steps ! :D"; ?>
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
Deprecated: Creation of dynamic property Staircase::$numberOfSteps is deprecated in /in/1WgpU on line 7 5.3 <= PHP < 5.4 only allows me to climb from the ground... the 125 steps :( ... but with PHP >= 5.4 I can make my way from the basement to the top, climbing the 150 steps ! :D
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
5.3 <= PHP < 5.4 only allows me to climb from the ground... the 125 steps :( ... but with PHP >= 5.4 I can make my way from the basement to the top, climbing the 150 steps ! :D
Output for 5.3.0 - 5.3.29
5.3 <= PHP < 5.4 only allows me to climb from the ground... the 125 steps :( ... Fatal error: Using $this when not in object context in /in/1WgpU on line 24
Process exited with code 255.
Output for 5.2.3 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/1WgpU on line 14
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.2
<br /> <b>Parse error</b>: syntax error, unexpected T_FUNCTION in <b>/in/1WgpU</b> on line <b>14</b><br />
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, 5.0.0 - 5.0.5
<br /> <b>Parse error</b>: parse error, unexpected T_FUNCTION in <b>/in/1WgpU</b> on line <b>14</b><br />
Process exited with code 255.
Output for 4.3.2 - 4.3.4
<br /> <b>Parse error</b>: parse error in <b>/in/1WgpU</b> on line <b>14</b><br />
Process exited with code 255.
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