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$str = 'Python, #Java@ !C 100 ^&CPP (*)PHP.'; $pattern = '/[^a-zA-Z0-9\s]/'; $str = preg_replace($pattern, "", $str); echo $str; /* run: Python Java C 100 CPP PHP */
$str = 'PHP Python, #Java@ !C 100 ^&CPP (*)Rust.'; $pattern = '/[^a-zA-Z0-9]/'; $str = preg_replace($pattern, "", $str); echo $str; /* run: PHPPythonJavaC100CPPRust */