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run code in 150+ php & hhvm versions
Bugs & Features
<?php function compound(array $arr) { $cache=array(); $rst=""; foreach($arr as $v) { if(empty($cache) || $v==end($cache)+1) { $cache[]=$v; } else { if(!empty($rst)) $rst.=","; if(count($cache)>2) $rst.=reset($cache)."-".end($cache); else $rst.=implode(",",$cache); $cache=array($v); } } if(!empty($rst)) $rst.=","; if(count($cache)>2) $rst.=reset($cache)."-".end($cache); else $rst.=implode(",",$cache); return $rst; } echo compound(array(1,2,3,5,6))."\n"; // gets "1-3,5,6" echo compound(array(1,3,4,5,6)); // gets "1,3-6"
Output for 5.1.1 - 7.1.0
1-3,5,6 1,3-6
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/untCF on line 26
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in /in/untCF on line 2
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_ARRAY, expecting ')' in /in/untCF on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_ARRAY, expecting ')' in /in/untCF on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/untCF on line 2
Process exited with code 255.