Verifying Image File Type in PHP
Securing file uploads is crucial to prevent malicious content from entering your system. In PHP, validating whether a received file is an image is essential.
While checking the file extension may appear insufficient, using getimagesize() offers a more reliable approach. This function analyzes the file's header information to determine its type. Here's a sample code snippet:
<code class="php">if (@is_array(getimagesize($mediapath))) { $image = true; } else { $image = false; }</code>
getimagesize() returns an array with the image dimensions, format, and additional information. A successful validation will result in an array, while a failure indicates a non-image file.
This approach ensures that only genuine image files are accepted, safeguarding your application from malicious file uploads.
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