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Working with File Uploads

So far, we've looked at simple form input. However, all popular Web browsers support file uploads, and so, of course, does PHP. In this section, you examine the features that PHP makes available to deal with this kind of input.

Information about the uploaded file becomes available to you in the $_FILES superglobal, which is indexed by the name of the upload field (or fields) in the form. The corresponding value for each of these keys is an associative array. These fields are described in Table 9.1, using fileupload as the name of the form field used for the upload.

Table 9.1. File Upload Global Variables

Element	Contains	Example
$_FILES['fileupload']['name']	Original name of uploaded file	test.gif
$_FILES['fileupload']['tmp_name'] ...