How to use header () in PHP

Editor to share with you how to use header () in PHP, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

Using PHPheader () function to realize the error prompt function of page 404

Phpheader404 is written:

Header ("HTTP/1.1404NotFound"); exit

If the above code doesn't work, try the following code:

Header ("Status:404NotFound")

You'd better write both pieces of code. Why can one piece of code work and one piece of code not? I don't know, but the best way to write it is as follows:

Header ("HTTP/1.1404NotFound")

Header ("Status:404NotFound")

Exit

By the way, this code must be executed before any output!

For more information on the use of phpheader functions, please refer to: http://tuzwu.iteye.com/blog/search?query=header

What the http status code represents (found on w3.org, authoritative enough):

* 1xxvir InformationalMutual Requestreceivedcontinuing process

* 2xxvir SuccessWassuccessfullyreceivedUnderstood

Andaccepted

* 3xx:Redirection-Furtheractionmustbetakeninorderto

Completetherequest

* 4xx:ClientError-Therequestcontainsbadsyntaxorcannotbe

Fulfilled

* 5xx:ServerError-Theserverfailedtofulfillanapparently

Validrequest

| | "100"; Continue |

Phpheader404 similar function

| | "101"; SwitchingProtocols |

| | 2000s; OK |

| | 201 "; Created |

| | 202 "; Accepted |

| | 203 "; Non-AuthoritativeInformation |

| | "204"; NoContent |

| | "205"; ResetContent |

| | 206mm; PartialContent |

| | "300"; MultipleChoices |

| | 301; MovedPermanently |

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