<?php echo "97, ".chr(97).", ".ctype_lower(97)."\n"; // 8.1以降ならば↓の非推奨警告がでます。 // Deprecated: ctype_lower(): Argument of type int will be interpreted as string in the future in /in/4C8hc on line 7 // 97, a, true // 8.0以前ならば下の様に何事もなく動きます。 // 97, a, true
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