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Old 10-07-2016, 06:26 AM   #1
chinmay.sahoo
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Arrow System Functions Applied to Strings

Many applications involve the manipulation of strings of characters: to compare one string with another, to make systematic changes to a string or to extract some of the characters from a string, amongst other purposes. For example a customer may enter their name into a form on a webpage and we may then wish to compare it with a succession of strings corresponding to the names of previous customers obtained from a database or a text fi le used for data collection. (We will show how to use databases, text fi les and web forms in later chapters.) PHP provides a large number of system functions for manipulating strings and new ones are likely to be added in later releases of the language. Many of the functions are for esoteric purposes that will never concern most users. Rather than trying to be encyclopaedic we will describe the functions that you are most likely to need to use.






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