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→Script Related Constants
As we mentioned briefly at the start of this chapter, PHP provides a number of built-in constants that can be of significant use to the PHP web developer. In the section we will look at some of the more common constants available.
=== PHP Script and Environment Related Constants ===
The following constants provide information about the script which currently being executed , and also the environment in which the PHP web server module is running. These are of particular use when debugging scripts:
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<td>DEFAULT_INCLUDE_PATH<td>The default path where PHP looks for include files</td>
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=== Mathematical PHP Constants ===
