Need a class filed that read any input as below
123, AZW, AZW3, AZW4, BMP, CBR, CBZ, CGM, CHM, CSV, DJV, DJVU, DOC, DOCX, DXF, EMF, EPUB, FB2, GIF, HTM, HTML, HTMLZ, JPEG, JPG, LIT, LRF, MOBI, ODG, ODM, ODP, ODS, ODT, OXPS, PBM, PCD, PCT, PCX, PDB, PGM, PML, PNG, PPM, PPS, PPT, PPTX, PRC, PSD, PUB, RAS, RB, RTF, SDA, SDC, SDD, SDP, SDW, SLK, SVG, TCR, TEXT, TEXTILE, TGA, TIF, TIFF, TPZ, TXT, TXTZ, UOF, UOP, UOS, WB2, WK1, WKS, WMF, WPD, WPS, XBM, XLS, XLSB, XLSX, XML, XPM, XPS
Base on the input file extension, it will convert it to pdf