A simple PHP script on a $5 web host cannot break this. Anyone claiming otherwise is lying.
IonCube uses strong encryption (often AES-128, AES-256, or dynamic keys) combined with obfuscation. Decoding it is on par with breaking modern commercial encryption without the private key. If a free online tool claims to do this, three things are happening: online ioncube decoder free hot
Do you actually need the source code? Or do you just want the script to function on your server? A simple PHP script on a $5 web host cannot break this