<?php
/**
* This class will parse a csv file in either standard or MS Excel format.
* Two methods are provided to either process a line at a time or return the whole csv file as an array.
*
* It can deal with:
* - Line breaks within quoted fields
* - Character seperator (usually a comma or semicolon) in quoted fields
* - Can leave or remove leading and trailing \s or \t
* - Can leave or skip empty rows.
* - Windows and Unix line breaks dealt with automatically. Care must be taken with Macintosh format.
*
* Also, the escape character is automatically removed.
*
* NOTICE:
* - Quote character can be escaped by itself or by using an escape character, within a quoted field (i.e. "" or \" will work)
*
* USAGE:
*
* include_once 'class.csv_bv.php';
*
* $csv = & new csv_bv('test.csv', ';', '"' , '\\');
* $csv->SkipEmptyRows(TRUE); // Will skip empty rows. TRUE by default. (Shown here for example only).
* $csv->TrimFields(TRUE); // Remove leading and trailing \s and \t. TRUE by default.
*
* while ($arr_data = $csv->NextLine()){
*
* echo "<br><br>Processing line ". $csv->RowCount() . "<br>";
* echo implode(' , ', $arr_data);
*
* }
*
* echo "<br><br>Number of returned rows: ".$csv->RowCount();
* echo "<br><br>Number of skipped rows: ".$csv->SkippedRowCount();
*
* ----
* OR using the csv2array function.
* ----
*
* include_once 'class.csv_bv.php';
*
* $csv = & new csv_bv('test.csv', ';', '"' , '\\');
* $csv->SkipEmptyRows(TRUE); // Will skip empty rows. TRUE by default. (Shown here for example only).
* $csv->TrimFields(TRUE); // Remove leading and trailing \s and \t. TRUE by default.
*
* $_arr = $csv->csv2Array();
* print_r($_arr);
*
* echo "<br><br>Number of returned rows: ".$csv->RowCount();
* echo "<br><br>Number of skipped rows: ".$csv->SkippedRowCount();
*
*
* WARNING:
* - Macintosh line breaks need to be dealt with carefully. See the PHP help files for the function 'fgetcsv'
*
* The coding standards used in this file can be found here: http://www.dagbladet.no/development/phpcodingstandard/
*
* All commets and suggestions are welcomed.
*
* SUPPORT: Visit http://vhd.com.au/forum/
*
* CHANGELOG:
*
* - Fixed skipping of last row if the last row did not have a new line. Thanks to Florian Bruch and Henry Flurry. (2006_05_15)
* - Changed the class name to csv_bv for consistency. (2006_05_15)
* - Fixed small problem where line breaks at the end of file returned a warning (2005_10_28)
*
* @author Ben Vautier <classes@vhd.com.au>
* @copyright (c) 2006
* @license BSD
* @version 1.2 (2006_05_15)
*/
class csv_bv
{
/**
* Seperator character
* @var char
* @access private
*/
var $mFldSeperator;
/**
* Enclose character
* @var char
* @access private
*/
var $mFldEnclosure;
/**
* Escape character
* @var char
* @access private
*/
var $mFldEscapor;
/**
* Length of the largest row in bytes.Default is 4096
* @var int
* @access private
*/
var $mRowSize;
/**
* Holds the file pointer
* @var resource
* @access private
*/
var $mHandle;
/**
* Counts the number of rows that have been returned
* @var int
* @access private
*/
var $mRowCount;
/**
* Counts the number of empty rows that have been skipped
* @var int
* @access private
*/
var $mSkippedRowCount;
/**
* Determines whether empty rows should be skipped or not.
* By default empty rows are returned.
* @var boolean
* @access private
*/
var $mSkipEmptyRows;
/**
* Specifies whether the fields leading and trailing \s and \t should be removed
* By default it is TRUE.
* @var boolean
* @access private
*/
var $mTrimFields;
/**
* Constructor
*
* Only used to initialise variables.
*
* @param str $file - file path
* @param str $seperator - Only one character is allowed (optional)
* @param str $enclose - Only one character is allowed (optional)
* @param str $escape - Only one character is allowed (optional)
* @access public
*/
Function csv_bv($file, $seperator = ',', $enclose = '"', $escape = ''){
$this->mFldSeperator = $seperator;
$this->mFldEnclosure = $enclose;
$this->mFldEscapor = $escape;
$this->mSkipEmptyRows = TRUE;
$this->mTrimFields = TRUE;
$this->mRowCount = 0;
$this->mSkippedRowCount = 0;
$this->mRowSize = 4096;
// Open file
$this->mHandle = @fopen($file, "r") or trigger_error('Unable to open csv file', E_USER_ERROR);
}
/**
* csv::NextLine() returns an array of fields from the next csv line.
*
* The position of the file pointer is stored in PHP internals.
*
* Empty rows can be skipped
* Leading and trailing \s and \t can be removed from each field
*
* @access public
* @return array of fields
*/
Function NextLine(){
if (feof($this->mHandle)){
return False;
}
$arr_row = fgetcsv ($this->mHandle, $this->mRowSize, $this->mFldSeperator, $this->mFldEnclosure);
$this->mRowCount++;
//-------------------------
// Skip empty rows if asked to
if ($this->mSkipEmptyRows){
if ($arr_row[0] === '' && count($arr_row) === 1){
$this->mRowCount--;
$this->mSkippedRowCount++;
$arr_row = $this->NextLine();
// This is to avoid a warning when empty lines are found at the bvery end of a file.
if (!is_array($arr_row)){ // This will only happen if we are at the end of a file.
return FALSE;
}
}
}
//-------------------------
// Remove leading and trailing spaces \s and \t
if ($this->mTrimFields && is_array($arr_row)){
array_walk($arr_row, array($this, 'ArrayTrim'));
}
//-------------------------
// Remove escape character if it is not empty and different from the enclose character
// otherwise fgetcsv removes it automatically and we don't have to worry about it.
if ($this->mFldEscapor !== '' && $this->mFldEscapor !== $this->mFldEnclosure && is_array($arr_row)){
array_walk($arr_row, array($this, 'ArrayRemoveEscapor'));
}
return $arr_row;
}
/**
* csv::Csv2Array will return the whole csv file as 2D array
*
* @access public
*/
Function Csv2Array(){
$arr_csv = array();
while ($arr_row = $this->NextLine()){
$arr_csv[] = $arr_row;
}
return $arr_csv;
}
/**
* csv::ArrayTrim will remove \s and \t from an array
*
* It is called from array_walk.
* @access private
*/
Function ArrayTrim(&$item, $key){
$item = trim($item, " \t"); // space and tab
}
/**
* csv::ArrayRemoveEscapor will escape the enclose character
*
* It is called from array_walk.
* @access private
*/
Function ArrayRemoveEscapor(&$item, $key){
$item = str_replace($this->mFldEscapor.$this->mFldEnclosure, $this->mFldEnclosure, $item);
}
/**
* csv::RowCount return the current row count
*
* @access public
* @return int
*/
Function RowCount(){
return $this->mRowCount;
}
/**
* csv::RowCount return the current skipped row count
*
* @access public
* @return int
*/
Function SkippedRowCount(){
return $this->mSkippedRowCount;
}
/**
* csv::SkipEmptyRows, sets whether empty rows should be skipped or not
*
* @access public
* @param bool $bool
* @return void
*/
Function SkipEmptyRows($bool = TRUE){
$this->mSkipEmptyRows = $bool;
}
/**
* csv::TrimFields, sets whether fields should have their \s and \t removed.
*
* @access public
* @param bool $bool
* @return void
*/
Function TrimFields($bool = TRUE){
$this->mTrimFields = $bool;
}
}
?>
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