I may be moving to Philly soon. What is a safe/clean neighborhood where I can find an apartment?

I want to attend Temple university and possibly Widener University (in Chester PA, right outside of Philadelphia) afterwards. I need to find a place to live for several years that would preferably be in the middle of these two schools. I don't know much about the city and want to know from people who live in the area, what neighborhoods are safe (I can walk alone at night and feel safe) and clean (don't want to cut myself on broken bottles everywhere). Thanks a bunch!!