https://www.php.net/manual/es/control-structures.elseif.php
PHP: elseif/else if - Manual
else ifphpelseifmanual
https://www.intel.com/content/www/us/en/docs/fortran-compiler/developer-guide-reference/2025-0/elseif-directive.html
ELSEIF Directive
Statement: Marks an optional branch in an IF Directive Construct.
elseifdirective
https://www.php.net/manual/fr/control-structures.elseif.php
PHP: elseif/else if - Manual
else ifphpelseifmanual
https://teamtreehouse.com/community/video:19192
Treehouse | Community | If / ElseIf Conditionals
treehousecommunityelseifconditionals
https://www.intel.com/content/www/us/en/docs/fortran-compiler/developer-guide-reference/2023-1/elseif-directive.html
ELSEIF Directive
Statement: Marks an optional branch in an IF Directive Construct.
elseifdirective
https://elseif.se/
Elseif AB
elseifab