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run code in 150+ php & hhvm versions
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<?php echo htmlspecialchars('<script>yay</script>');
Output for 4.3.0 - 5.6.21, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
&lt;script&gt;yay&lt;/script&gt;