Clearly you didn't read the link. Let me educate you .
In conclusion, the modern-day Palestinians did not emerge directly from the Ancient Philistines of Biblical times. Rather, the term ‘Palestinians’ describes the population of modern Palestine. It is a population primarily comprised of Arabs. This population arrived in the area principally during the Islamic conquests of the Levant.
In addition to this primarily Arabic component, many modern-day Palestinians must also descend from Ancient Jewish and Samaritan families. Furthermore, some Ancient Philistine families must have descendants among the modern Palestinians, although they are completely imperceptible as a distinct group.