move this file into a directory from which you want all files with a specific ending get moved to another ending.

massmove.py

import os.path
from os import listdir
from os.path import isfile, join

mypath="./"
targetdir=mypath+"./"
sourceending="php"
targetending="jpg"
dirs = [f for f in listdir(mypath) if not isfile(join(mypath, f))] 
# print(dirs)
for d in dirs:
    onlyfiles = [f for f in listdir(d) if isfile(join(d, f))] 
    # print(onlyfiles)
    for i in onlyfiles:
        # print(d+i)
        tmp = i.split(".")
        if len(tmp)>1 and tmp[1]==sourceending:
            # print("rename from {} to {}".format(d+"/"+i,d+"/"+tmp[0]+".jpg"))
            os.rename(d+"/"+i,d+"/"+tmp[0]+targetending)
            print("rename from {} to {}".format(d+"/"+i,d+"/"+tmp[0]+targetending))
            # print("Moved {}".format(i))
        else:
            print("Didnt handle ",i)