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run code in 300+ PHP versions simultaneously
<?php // UTF-16 surrogate codepoints have no valid encoding in any UTF form. // https://en.wikipedia.org/wiki/UTF-16#U.2BD800_to_U.2BDFFF // If they could be validly represented in UTF-8 their bytes // would be: $high = "\xED\xa1\x92"; // codepoint D852 $low = "\xED\xBD\xA2"; // codepoint DF62 $pair = $high.$low; var_dump( @\iconv('UTF-8', 'UTF-8', $high) === false, @\iconv('UTF-8', 'UTF-8', $low) === false, @\iconv('UTF-8', 'UTF-8', $pair) === false ); /* Should be: * bool(true) * bool(true) * bool(true) * * Result on Windows with 7.0 or 7.1 is: * bool(false) * bool(false) * bool(false) */
Output for 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 - 7.3.31, 7.4.0 - 7.4.32, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
bool(true) bool(true) bool(true)
Output for 7.3.32 - 7.3.33, 7.4.33, 8.0.13
Fatal error: Uncaught Error: Call to undefined function iconv() in /in/Ff6cr:13 Stack trace: #0 {main} thrown in /in/Ff6cr on line 13
Process exited with code 255.
Output for 5.4.0 - 5.4.45

Process exited with code 255.
Output for 5.3.0 - 5.3.29
bool(false) bool(false) bool(false)
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/Ff6cr on line 13 Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/Ff6cr on line 14 Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/Ff6cr on line 15 bool(false) bool(false) bool(false)
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/Ff6cr on line 13 Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/Ff6cr on line 14 Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/Ff6cr on line 15
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/Ff6cr on line 13 Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/Ff6cr on line 14 Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/Ff6cr on line 15
preferences:
151.77 ms | 413 KiB | 5 Q