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I am using file_get_contents() to pull some images from a remote server and I want to confirm if the result string is a JPG/PNG image before further processing, like saving it locally and create thumbs.
$string = file_get_contents($url);
How would you do this?
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Return Values ¶ The function returns the read data or false on failure. This function may return Boolean false , but may also return a non-Boolean value which evaluates to false . Please read the section on Booleans for more information.
The file_get_contents() reads a file into a string. This function is the preferred way to read the contents of a file into a string. It will use memory mapping techniques, if this is supported by the server, to enhance performance.
They both read an entire file, but file reads the file into an array, while file_get_contents reads it into a string.
$file: It specifies the file in which you want to write. $data: It specifies the data that has to be written on the file. It can be a string, an array, or a data stream.
You can use
exif_imagetype()
to evaluate your file. Please do check the php manual.
Edited :
Please note that PHP_EXIF must be enabled. You can read more about it here
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