Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Introducing Content Health, a new way to keep the knowledge base up-to-date. Podcast what if you could invest in your favorite developer? Featured on Meta. Now live: A fully responsive profile. Reducing the weight of our footer. This is a very widespread problem and unfortunately even the PHP manual is plagued with errors. There is no such thing in HTTP.
You may add those headers if you want, but they do absolutely nothing. Sadly, this wrong example is present even in the PHP manual. The author must have been really frustrated and added three Content-Type headers.
What would it be like to not having to worry about old versions of Internet Explorer? Note: the quotes in the filename are required in case the file may contain spaces. The code above will fail in IE6 unless the following are added:. Now, the use of Cache-Control is wrong in this case, especially to both values set to zero, according to Microsoft , but it works in IE6 and IE7 and later ignores it so no harm done.
If you still get strange results when downloading especially in IE , make sure that the PHP output compression is disabled, as well as any server compression sometimes the server inadvertently applies compression on the output produced by the PHP script.
Historically it had some performance issues and while the documentation claims there are no memory problems, real-life scenarios beg to differ — output buffering and other subtle things. Tip As of PHP 5. Extremely simple function to get human filesize.
The first example given may lead one to assume that this function works with a local filename e. If you didn't know this, it would look like a nasty bug. So, everyone tells you to insert clearstatcache which is supposed to clear the cached value and allow you to retrieve the current file size but it still does nothing and looks like another bug! This function also can be great for browser caching controll. For example, you have a stylesheet and you want to make sure everyone has the most recent version.
SWF files stored in the database as blob data and couldn't find a simple solution, so I created my own. Particularly useful for running getimagesize to get the width and height of. SWF Flash files that are stored in the database as blob data. Tested on PHP 5. SWF file from the Adobe website and store it into a variable. This function returns the width and height of a JPEG image from a string, allowing the dimensions of images stored in a database to be retrieved without writing them to the disk first, or using "imagecreatefromstring" which is very slow in comparison.
Do not use this instead of getimagesize when dealing with files, getimagesize is much faster coming in at 0. Hope someone finds this helpful. It's always good to check out an image's dimensions while attempting to upload to your server or database Well, I am making a script which will resize the image when uploaded, however, i am making a multi-uploader, so i came across with a problem: an efficient way of getting a pictures height and width and storing them in an array to resize later.
Returns a array with 4 elements. The 0 index is the width of the image in pixels. The 1 index is the height of the image in pixels.
The regular expression in the above example line no-8 will simply not allow those files whose name starts or ends with a dot character.
Please check out the tutorial on regular expressions to learn the regular expressions in details. Is this website helpful to you? Please give us a like , or share your feedback to help us improve.
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