After reading this tutorial, you should have a good handle on the different string functions available to you in PHP. You should be able to decide when each function is appropriate to use and be able to perform a variety of tasks using a combination of the presented functions.
One thing to keep in mind while developing PHP applications is that the string functions presented here will normally be your most efficient method, performance wise, of solving a task if they provide the functionality needed. Obviously, if there is a built in function to PHP it will out perform a user defined function built around these functions. But, the important thing to realize is that the functions from this tutorial will consistently out perform their regular expression counterparts. Because of this, you should try and utilize string functions where possible. There are many situations where it is not possible to reasonably solve a problem with these functions. In those cases, use the more appropriate function.
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