3v4l.org

run code in 300+ PHP versions simultaneously
<?php $end = 20; for($f = 0; $f <= $end; $f++) { $f1 .= $f; for($n = $f+1; $n <= $end+1; $n++) { $n1 .= $n; for($i = $n +1; $i <= $end+2; $i++) { $i1 .= $i; } } echo "F".$f.": ".(($f1-$n1)+$f1-$1); }
Output for 5.4.0 - 5.4.34
Parse error: syntax error, unexpected '1' (T_LNUMBER), expecting variable (T_VARIABLE) or '$' in /in/qC3f9 on line 11
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected T_LNUMBER, expecting T_VARIABLE or '$' in /in/qC3f9 on line 11
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_LNUMBER, expecting T_VARIABLE or '$' in /in/qC3f9 on line 11
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_VARIABLE' or `'$'' in /in/qC3f9 on line 11
Process exited with code 255.
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219.58 ms | 1394 KiB | 124 Q