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# Predefined Constants

The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.

`FDFValue` (integer)
`FDFStatus` (integer)
`FDFFile` (integer)
`FDFID` (integer)
`FDFFf` (integer)
`FDFSetFf` (integer)
`FDFClearFf` (integer)
`FDFFlags` (integer)
`FDFSetF` (integer)
`FDFClrF` (integer)
`FDFAP` (integer)
`FDFAS` (integer)
`FDFAction` (integer)
`FDFAA` (integer)
`FDFAPRef` (integer)
`FDFIF` (integer)
`FDFEnter` (integer)
`FDFExit` (integer)
`FDFDown` (integer)
`FDFUp` (integer)
`FDFFormat` (integer)
`FDFValidate` (integer)
`FDFKeystroke` (integer)
`FDFCalculate` (integer)
`FDFNormalAP` (integer)
`FDFRolloverAP` (integer)
`FDFDownAP` (integer)

Resource Types
Examples
Forms Data Format Functions
PHP Manual