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run code in 300+ PHP versions simultaneously
<?php $x = 'a thing of beauty ...'; echo "${x}\n"; echo ${x},"\n"; echo $x;
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: Using ${var} in strings is deprecated, use {$var} instead in /in/hfsEC on line 3 a thing of beauty ... Fatal error: Uncaught Error: Undefined constant "x" in /in/hfsEC:4 Stack trace: #0 {main} thrown in /in/hfsEC on line 4
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
a thing of beauty ... Fatal error: Uncaught Error: Undefined constant "x" in /in/hfsEC:4 Stack trace: #0 {main} thrown in /in/hfsEC on line 4
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
a thing of beauty ... Warning: Use of undefined constant x - assumed 'x' (this will throw an Error in a future version of PHP) in /in/hfsEC on line 4 a thing of beauty ... a thing of beauty ...
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33
a thing of beauty ... Notice: Use of undefined constant x - assumed 'x' in /in/hfsEC on line 4 a thing of beauty ... a thing of beauty ...

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