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The imagetypes() function is an inbuilt function in PHP which is used to return the image types supported by the PHP inbuilt installed library.

Syntax:

int imagetypes( void )
Parameters: This function does not accept any parameter.

Return Value: This function returns the bit-field corresponding to the image formats supported by the version of GD linked into PHP. This function returns the following bits: IMG_BMP, IMG_GIF, IMG_JPG, IMG_PNG, IMG_WBMP, IMG_XPM, IMG_WEBP.

Below programs illustrate the imagetypes() function in PHP:

Program 1:

Output:

PNG Support is enabled
Program 2:

Output:

JPEG Support is enabled

When you use set State(), then apart from assigning to the object state React also re renders the component and all its children. We would get error like this: Can only update a mounted or mounting component. Hence we need to use this. stateto initialize variables inside constructor.