95 lines
3.3 KiB
PHP
95 lines
3.3 KiB
PHP
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<?
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/**********************************************************************
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**
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** A class to search text in pdf documents.
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** Not pretending to be useful other than that.
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** But it can easily be extended to a full featured pdf document
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** parser by anyone who chooses so.
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**
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** Author: Rene Kluwen / Chimit Software <rene.kluwen@chimit.nl>
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**
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** License: Public Domain
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** Warranty: None
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**
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***********************************************************************/
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class pdf {
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// Just one private variable.
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// It holds the document.
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var $_buffer;
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var $_filename;
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// Constructor. Takes the pdf document as only parameter
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function pdf($file) {
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$this->_filename = $file;
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if(file_exists($this->_filename)){
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$fp = fopen($this->_filename, "r");
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$content = fread($fp, filesize($this->_filename));
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fclose($fp);
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$this->_buffer = $content;
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}else{
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echo "Error: File not found!";
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}
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}
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// This function returns the next line from the document.
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// If a stream follows, it is deflated into readable text.
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function nextline() {
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$pos = strpos($this->_buffer, "\r");
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if ($pos === false) {
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return false;
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}
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$line = substr($this->_buffer, 0, $pos);
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$this->_buffer = substr($this->_buffer, $pos + 1);
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if (preg_match("/stream/", $line)) {
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echo "stream found and counted for...";
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$endpos = strpos($this->_buffer, "endstream");
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$stream = substr($this->_buffer, 1, $endpos - 1);
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$stream = @gzuncompress($stream);
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$this->_buffer = $stream . substr($this->_buffer, $endpos + 9);
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}
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return $line;
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}
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// This function returns the next line in the document that is printable text.
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// We need it so we can search in just that portion.
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function textline() {
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$line = $this->nextline();
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if ($line === false) {
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return false;
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}
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if (preg_match("/[^\\\\]\\((.+)[^\\\\]\\)/", $line, $match)) {
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$line = preg_replace("/\\\\(\d+)/e", "chr(0\\1);", $match[1]);
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return stripslashes($line);
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}
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$this->textline();
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}
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function pdf2text() {
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$filecontent = ""; // String datatype container for the found text...
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// the file has the extension '.pdf' and needs to be 'txt'...
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$filename = ereg_replace("(.*)\.([^\.]*)$", "\\1", $this->_filename).".txt";
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while (($line = $this->nextline()) !== false) {
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$filecontent .= $line."\n";
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}
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if ($fp = fopen("$filename", "w+")) {
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fputs($fp, $filecontent, strlen($filecontent));
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fclose ($fp);
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return true;
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}
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}
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// This function returns true or false, indicating whether the document contains
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// the text that is passed in $str.
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function textfound($str) {
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while (($line = $this->textline()) !== false) {
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if (preg_match("/$str/i", $line) != 0) {
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return true;
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}
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}
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return false;
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}
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}
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?>
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