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# XML_Statistics::countPI()

XML_Statistics::countPI() -- count the occurences of a processing instruction

## Synopsis

    require_once 'XML/Statistics.php';

``integer XML_Statistics::countPI` ([string $target = null])`

## Description

Counts how often a certain processing instruction (e.g. <?PHP) is used in the document. The target is the 'language' of the processing instruction. You only need to specify the name, without the leading question mark. If no target is specified it will count the total number of processing instructions.

## Parameter

- `string $target` - target of the processing instruction

## Return value

integer occurences of the processing instruction

## Note

This function can not be called statically.

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