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<?php $zip_code = 09876-0001; echo $zip_code,"\n"; // -1 $zip_code = (string) (09876-0001); echo var_dump($zip_code),"\n"; // '-1' $zip_code = "09876-0001"; echo $zip_code; // 09876-0001
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-1 string(2) "-1" 09876-0001