3v4l.org

run code in 300+ PHP versions simultaneously
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Output for 8.1.0 - 8.1.32, 8.2.0 - 8.2.28, 8.3.0 - 8.3.20, 8.4.1 - 8.4.6
<a href="mailto:a@mail.com?subject=Gas & Oil Deprecated: urlencode(): Passing null to parameter #1 ($string) of type string is deprecated in /in/kFu1v on line 9 ">Apply</a><br> <!-- doesn't work --> <a href="mailto:a@mail.com?subject=Gas+%26+Oil">Apply</a> <!-- works -->
Output for 5.6.0 - 5.6.40, 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, 8.0.0 - 8.0.30
<a href="mailto:a@mail.com?subject=Gas & Oil">Apply</a><br> <!-- doesn't work --> <a href="mailto:a@mail.com?subject=Gas+%26+Oil">Apply</a> <!-- works -->
preferences:
184.44 ms | 413 KiB | 5 Q