You might find yourself in the position of not knowing which function should be called when you are writing a script. You want to decide based on data you have during execution. One way to accomplish this is to set a variable with the name of a function and then use the variable as if it were a function.
If you follow a variable with parentheses, the value of the variable will betreated as the name of a function. demonstrates this. Keep in mind that you can't refer to built-in functions in this way. Setting myFunction to be print will cause an error.
Dynamically Calling a Function<?
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An Introduction To Php
Variables, Operators, And Expressions
Classes And Objects
I/o And Disk Access
Time, Date, And Configuration Functions
Parsing And String Evaluation
Sorting Searching And Random Numbers
Integration With Html
Efficiency And Debugging
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