Bitwise Operators

Bitwise Operators

Bitwise operators allow you to turn specific bits within an integer on or off. If both the left- and right-hand parameters are strings, the bitwise operator will operate on the characters' ASCII values.

<?php
echo 12 ^ 9; // Outputs '5'

echo "12" ^ "9"; // Outputs the Backspace character (ascii 8)
                 // ('1' (ascii 49)) ^ ('9' (ascii 57)) = #8

echo "hallo" ^ "hello"; // Outputs the ascii values #0 #4 #0 #0 #0
                        // 'a' ^ 'e' = #4
?>

Table 15-3. Bitwise Operators

ExampleNameResult
$a & $bAndBits that are set in both $a and $b are set.
$a | $bOrBits that are set in either $a or $b are set.
$a ^ $bXor Bits that are set in $a or $b but not both are set.
~ $aNot Bits that are set in $a are not set, and vice versa.
$a << $bShift left Shift the bits of $a $b steps to the left (each step means "multiply by two")
$a >> $bShift right Shift the bits of $a $b steps to the right (each step means "divide by two")

Warning

Don't right shift for more than 32 bits on 32 bits systems. Don't left shift in case it results to number longer than 32 bits.



Links
Bluehost $6.95/mo
  • 50GB Diskspace
  • 999GB Bandwidth
  • Host 6 Domains
  • CGI Ruby(RoR) Perl PHP MySQL PostgreSQL
  • Support Custom PHP.INI
  • SSH SSL FTP Stats
  • Free Domain Forever
  • 27/7 Support

Bluefish $6.95/mo
  • 6GB Diskspace
  • 100GB Bandwidth
  • PHP Perl MySQL SSI CGI SSL
  • Free Domain
  • No Setup Fees
  • No Hidden Fees

IX Web Hosting $6.45/mo
  • 400GB Diskspace
  • 2500GB Bandwidth
  • Host 8 Domains
  • PHP Perl CGI SSI
  • MySQL PostgreSQL
  • 3 Free Domain For Life
  • Additional costs for Windows plan + $2.50:ASP/.NET, Cold Fusion, ODBC/DSN, MSSQL

Hosting Companies


Partners


Quick Search
Platform

Price

Diskspace

Bandwidth


 Advance Search
 Show All Companies



Reference & Manual

If you are looking for dedicated servers, look no further. HostPulse.com is a site devoted to help web users find cheap web hosting and dedicated servers.


Free Sitemap Generator Host Login/Register | Contact Us | Terms | Add Links
Thumbnails by Thumbshots.org © 2002-2010 CheapHostDir.com