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CRC-PHP is a PHP class implementing bitwise CRC-8/16/24/32/64 algorithms.

• PHP 8.0+
• CRC-32 and CRC-64 methods require a 64-bit build of PHP.

Calculate the CRC-16/XMODEM result for a string:

use xenocrat\crc;
$crc = crc::crc16_xmodem("foobar");

Read data from disk and calculate the CRC-24/OPENPGP result:

$file = file_get_contents("README.md");
$crc = crc::crc24_openpgp($file);

Test all implementations by comparing a calculated result to a check value:

$results = crc::test_crc8();
$results = crc::test_crc16();
$results = crc::test_crc24();
$results = crc::test_crc32();
$results = crc::test_crc64();

• CRC-8/AUTOSAR: crc8_autosar()
• CRC-8/BLUETOOTH: crc8_bluetooth()
• CRC-8/CDMA2000: crc8_cdma2000()
• CRC-8/DARC: crc8_darc()
• CRC-8/DVB-S2: crc8_dvb_s2()
• CRC-8/GSM-A: crc8_gsm_a()
• CRC-8/GSM-B: crc8_gsm_b()
• CRC-8/HITAG: crc8_hitag()
• CRC-8/I-432-1: crc8_i_432_1()
• CRC-8/I-CODE: crc8_i_code()
• CRC-8/LTE: crc8_lte()
• CRC-8/MAXIM-DOW: crc8_maxim_dow()
• CRC-8/MIFARE-MAD: crc8_mifare_mad()
• CRC-8/NRSC-5: crc8_nrsc_5()
• CRC-8/OPENSAFETY: crc8_opensafety()
• CRC-8/ROHC: crc8_rohc()
• CRC-8/SAE-J1850: crc8_sae_j1850()
• CRC-8/SMBUS: crc8_smbus()
• CRC-8/TECH-3250: crc8_tech_3250()
• CRC-8/WCDMA: crc8_wcdma()
• CRC-16/A: crc16_a()
• CRC-16/ARC: crc16_arc()
• CRC-16/CDMA2000: crc16_cdma2000()
• CRC-16/CMS: crc16_cms()
• CRC-16/DDS-110: crc16_dds_110()
• CRC-16/DECT-R: crc16_dect_r()
• CRC-16/DECT-X: crc16_dect_x()
• CRC-16/DNP: crc16_dnp()
• CRC-16/EN-13757: crc16_en_13757()
• CRC-16/GENIBUS: crc16_genibus()
• CRC-16/GSM: crc16_gsm()
• CRC-16/IBM-3740: crc16_ibm_3740()
• CRC-16/IBM-SDLC: crc16_ibm_sdlc()
• CRC-16/KERMIT: crc16_kermit()
• CRC-16/LJ1200: crc16_lj1200()
• CRC-16/M17: crc16_m17()
• CRC-16/MAXIM-DOW: crc16_maxim_dow()
• CRC-16/MCRF4XX: crc16_mcrf4xx()
• CRC-16/MODBUS: crc16_modbus()
• CRC-16/NRSC-5: crc16_nrsc_5()
• CRC-16/OPENSAFETY-A: crc16_opensafety_a()
• CRC-16/OPENSAFETY-B: crc16_opensafety_b()
• CRC-16/PROFIBUS: crc16_profibus()
• CRC-16/RIELLO: crc16_riello()
• CRC-16/SPI-FUJITSU: crc16_spi_fujitsu()
• CRC-16/T10-DIF: crc16_t10_dif()
• CRC-16/TELEDISK: crc16_teledisk()
• CRC-16/TMS37157: crc16_tms37157()
• CRC-16/UMTS: crc16_umts()
• CRC-16/USB: crc16_usb()
• CRC-16/XMODEM: crc16_xmodem()
• CRC-24/BLE: crc24_ble()
• CRC-24/FLEXRAY-A: crc24_flexray_a()
• CRC-24/FLEXRAY-B: crc24_flexray_b()
• CRC-24/INTERLAKEN: crc24_interlaken()
• CRC-24/LTE-A: crc24_lte_a()
• CRC-24/LTE-B: crc24_lte_b()
• CRC-24/OPENPGP: crc24_openpgp()
• CRC-24/OS-9: crc24_os_9()
• CRC-32/AIXM: crc32_aixm()
• CRC-32/AUTOSAR: crc32_autosar()
• CRC-32/BASE91-D: crc32_base91_d()
• CRC-32/BZIP2: crc32_bzip2()
• CRC-32/CD-ROM-EDC: crc32_cd_rom_edc()
• CRC-32/CKSUM: crc32_cksum()
• CRC-32/ISCSI: crc32_iscsi()
• CRC-32/ISO-HDLC: crc32_iso_hdlc()
• CRC-32/JAMCRC: crc32_jamcrc()
• CRC-32/MEF: crc32_mef()
• CRC-32/MPEG-2: crc32_mpeg_2()
• CRC-32/XFER: crc32_xfer()
• CRC-64/ECMA-182: crc64_ecma_182()
• CRC-64/GO-ISO: crc64_go_iso()
• CRC-64/MS: crc64_ms()
• CRC-64/WE: crc64_we()
• CRC-64/XZ: crc64_xz()