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#string_functions #string #functions #string_functions_in_php_programming #php_tutorial #php #learn_php #php_tutorial_for_beginners_full #php_tutorial_for_beginners #php_tutorial_for_absolute_beginners #learn_php_2022 #php_8 #learn_php_8 #php_7 #learn_php_7 #string_function #php_string_functions #strtoupper #strtolower #ucword #ucfirst #trim #strlen #str_replaceКомментарии: