1. How To Discovery a String of Regular Expressions on PHP For example, we would like to whether the string "must" in the string "gestiyawati"? The simplest way is looping from beginning to end to release the results is found or not. Okay, go directly to the listing program. an example is made in a simple PHP programming language, can be written: $string = 'gestiyawati';$pattern = 'gesti';if(($location ...