3v4l.org

run code in 300+ PHP versions simultaneously
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Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.31, 8.2.0 - 8.2.27, 8.3.0 - 8.3.18, 8.4.1 - 8.4.5
libxml: 2.9.4 XML: <?xml version="1.0"?> <head><script><![CDATA[ if (1 < 4) { alert("hello"); } ]]></script></head> HTML: <head><script> if (1 < 4) { alert("hello"); } </script></head>
Output for 5.3.25 - 5.3.29
libxml: 2.9.1 XML: <?xml version="1.0"?> <head><script><![CDATA[ if (1 < 4) { alert("hello"); } ]]></script></head> HTML: <head><script> if (1 < 4) { alert("hello"); } </script></head>
Output for 5.3.15 - 5.3.24
libxml: 2.8.0 XML: <?xml version="1.0"?> <head><script><![CDATA[ if (1 < 4) { alert("hello"); } ]]></script></head> HTML: <head><script> if (1 < 4) { alert("hello"); } </script></head>
Output for 5.3.0 - 5.3.14
libxml: 2.7.8 XML: <?xml version="1.0"?> <head><script><![CDATA[ if (1 < 4) { alert("hello"); } ]]></script></head> HTML: <head><script> if (1 < 4) { alert("hello"); } </script></head>

preferences:
147.33 ms | 415 KiB | 5 Q