PHP crc32() Function

PHP crc32() function is important string function, which is used to calculate the crc32( cyclic redundancy checksum ) polynomial of a string. It can be used to validate data integrity.

Note : you are using crc32() function then, you must have to use %u formatter for the printf() or sprintf() function. If you are not using then it will return incorrect or negative value.

Syntax:

Parameter	Description	Required/Optional
string	The string to be calculated.	Required

Example 1

<?php
$checksum = crc32("Hello how are you?.");
printf("%u\n", $checksum);
?>

Output:

2454994420

Example 2

<?php
$str ="Hello JavaTpoint";
echo "Your string value is : ".$str."<br>";
$str =crc32($str);
printf("%u\n", $str);
?>

Output:

Your string value is : Hello JavaTpoint
1303530391

Example 3

<?php
$str = crc32("Hello JavaTpoint");
echo 'Without %u: '.$str."<br>";
echo 'With %u: ';
printf("%u",$str);
?>

Output:

Without %u: 1303530391
With %u: 1303530391

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PHP crc32() Function

Note : you are using crc32() function then, you must have to use %u formatter for the printf() or sprintf() function. If you are not using then it will return incorrect or negative value.

Syntax:

Example 1

Example 2

Example 3

Feedback

Help Others, Please Share

Learn Latest Tutorials

Preparation

Trending Technologies

B.Tech / MCA