**
** License: Public Domain
** Warranty: None
**
***********************************************************************/
class pdf_search {
// Just one private variable.
// It holds the document.
var $_buffer;
// Constructor. Takes the pdf document as only parameter
function pdf_search($buffer) {
$this->_buffer = $buffer;
}
// This function returns the next line from the document.
// If a stream follows, it is deflated into readable text.
function nextline() {
$pos = strpos($this->_buffer, "\r");
if ($pos === false) {
return false;
}
$line = substr($this->_buffer, 0, $pos);
$this->_buffer = substr($this->_buffer, $pos + 1);
if ($line == "stream") {
$endpos = strpos($this->_buffer, "endstream");
$stream = substr($this->_buffer, 1, $endpos - 1);
$stream = @gzuncompress($stream);
$this->_buffer = $stream . substr($this->_buffer, $endpos + 9);
}
return $line;
}
// This function returns the next line in the document that is printable text.
// We need it so we can search in just that portion.
function textline() {
$line = $this->nextline();
if ($line === false) {
return false;
}
if (preg_match("/[^\\\\]\\((.+)[^\\\\]\\)/", $line, $match)) {
$line = preg_replace("/\\\\(\d+)/e", "chr(0\\1);", $match[1]);
return stripslashes($line);
}
return $this->textline();
}
// This function returns true or false, indicating whether the document contains
// the text that is passed in $str.
function textfound($str) {
while (($line = $this->textline()) !== false) {
echo $line;
if (preg_match("/$str/i", $line) != 0) {
return true;
}
}
return false;
}
}
?>
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