Php crc32 calculates the 32-bit CRC (cyclic redundancy check) and crc32crc of the string.

Php crc32 calculates the 32-bit CRC (cyclic redundancy check) and crc32crc of the string.

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The php crc32 function is used to generate a 32-bit Cyclic Redundancy checkcode polynomial of a string. This is usually used to check whether the transmitted data is complete. This article introduces the basic syntax and examples of php crc32 functions. For more information about the coders, see.

Crc32 function compute the crc32 polynomial of a string

 

Basic crc32 function syntax

int crc32 ( string $str )

Generate the 32-bit Cyclic Redundancy checksum polynomial of str. This is usually used to check whether the transmitted data is complete.

Tip:To ensure that the correct string representation is obtained from the crc32 () function, you need to use the % u format character of the printf () or sprintf () function. If % u is not used, the result may be displayed as an incorrect number or a negative number.

 

Crc32 Parameters

Parameters	Description
String	Required. The data to be verified.

 

Crc32 Return Value

Returns the str crc32 verification integer.

 

Crc32 function instance:

The second line in the example demonstrates how to use the printf () function to convert the verification code:

<?php $checksum  =  crc32 ( "The quick brown fox jumped over the lazy dog." ); printf ( "%u\n" ,  $checksum );?> 

Online operation

Running result:

2191738434