August 2000
Intermediate to advanced
800 pages
13h 15m
English
Content preview from Core PHP Programming: Using PHP to Build Dynamic Web SitesBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Arbitrary-Precision Numbers
Doubles are usually sufficiently precise for any numerical analysis you may wish to perform. However, PHP offers a way to work with numbers of much higher precision. The functions in this section use strings to store very long floating-point numbers. They each use a scale value that is the number of digits to the right of the decimal point. The scale argument that appears in all of the functions is optional and will override the default scale. The bcscale function, described in Chapter 11, "Date, Time, and Configuration Functions," sets the default scale.
These functions are activated when PHP is compiled. They are part of the binary distribution for windows, but they are not activated by default for other operating ...
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