When using PHP to output an image, it won't be cached by the client so if you don't want them to download the image each time they reload the page, you will need to emulate part of the HTTP protocol. You can usually useĪnd dirname() to make an absolute URI from a Including the scheme, hostname and absolute path. ![]() Most contemporary clients accept relative URIs as argument toīut some older clients require an absolute URI The status may be overriddenīy calling header() with a new status lineĪt any time unless the HTTP headers have already been sent. ![]() To the client, regardless of the actual header()Ĭall being the first or not. The HTTP status header line will always be the first sent In your script, or setting the output_bufferingĬonfiguration directive on in your php.ini or With the overhead of all of your output to the browser being buffered You can use output buffering to get around this problem, Headers will only be accessible and output when a SAPI that supports them You may also pass in a different status code, different headers, and even set whether to use HTTP or HTTPS.Getting Started Introduction A simple tutorial Language Reference Basic syntax Types Variables Constants Expressions Operators Control Structures Functions Classes and Objects Namespaces Enumerations Errors Exceptions Fibers Generators Attributes References Explained Predefined Variables Predefined Exceptions Predefined Interfaces and Classes Predefined Attributes Context options and parameters Supported Protocols and Wrappers Security Introduction General considerations Installed as CGI binary Installed as an Apache module Session Security Filesystem Security Database Security Error Reporting User Submitted Data Hiding PHP Keeping Current Features HTTP authentication with PHP Cookies Sessions Dealing with XForms Handling file uploads Using remote files Connection handling Persistent Database Connections Command line usage Garbage Collection DTrace Dynamic Tracing Function Reference Affecting PHP's Behaviour Audio Formats Manipulation Authentication Services Command Line Specific Extensions Compression and Archive Extensions Cryptography Extensions Database Extensions Date and Time Related Extensions File System Related Extensions Human Language and Character Encoding Support Image Processing and Generation Mail Related Extensions Mathematical Extensions Non-Text MIME Output Process Control Extensions Other Basic Extensions Other Services Search Engine Extensions Server Specific Extensions Session Extensions Text Processing Variable and Type Related Extensions Web Services Windows Only Extensions XML Manipulation GUI Extensions Keyboard Shortcuts ? This help j Next menu item k Previous menu item g p Previous man page g n Next man page G Scroll to bottom g g Scroll to top g h Goto homepage g s Goto search Redirect()->to() takes in the path to be redirected to if the path is not found, a 404 page is returned. In this shot, all examples will use the redirect() helper rather than the facade. You can redirect with the redirect helper or the Redirect facade. ![]() Laravel offers two common ways to handle redirects and send users to where they should be. Redirects are needed when users visit routes that they are not permitted to visit, or try to perform actions that they are not permitted to perform.
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