PHP VERSION: 5.6.40

TEST PHP 8.4 [ mb_ucfirst & mb_lcfirst ]

TEXT [1] The quick brown fox jumps over the lazy dog

TEXT [2] the quick brown fox jumps over the lazy dog

mb_lcfirst [FROM TEXT 1] the quick brown fox jumps over the lazy dog

mb_ucfirst [FROM TEXT 2] The quick brown fox jumps over the lazy dog