php csv to array (csv 转数组)

原创 admin  2018-01-15 11:16  阅读 400 次

1. 使用类

注意: user.csv 第一行默认为数组的键, 且第一行不会被打印; (区别于下面的普通函数方法 )

例如:

name age gender
zhang 23 male
li 20 female

结果:

Array
(
    [0] => Array
        (
            [name] => zhang 
            [age] => 23
            [gender] => male
        )

    [1] => Array
        (
            [name] => li 
            [age] => 20
            [gender] => female
        )
)

回到正题:

<?php 
//ini_set('memory_limit', '-1'); // 如果csv比较大的话,可以添加。
/*
 *  $file : csv file
 *  $csvDataArr : header of csv table, eg: arary('name','sex','age') or array(0,1,2)
 *  $specialhtml : whether do you want to convert special characters to html entities ?
 *  $removechar : which type do you want to remove special characters in array keys, manual or automatical ?
 */
class csv_to_array
{
    private $counter;
    private $handler;
    private $length;
    private $file;
    private $seprator;
    private $specialhtml;
    private $removechar = 'manual';
    private $csvDataArr;
    private $csvData = array();

    function __construct($file = '', $csvDataArr = '', $specialhtml = true, $length = 1000, $seprator = ',')
    {
        $this->counter = 0;
        $this->length = $length;
        $this->file = $file;
        $this->seprator =  $seprator;
        $this->specialhtml =  $specialhtml;
        $this->csvDataArr = is_array($csvDataArr) ? $csvDataArr : array();
        $this->handler = fopen($this->file, "r");
    }

    function get_array()
    {
        $getCsvArr = array();
        $csvDataArr = array();
        while(($data = fgetcsv($this->handler, $this->length, $this->seprator)) != FALSE)
        {
            $num = count($data);
            $getCsvArr[$this->counter] = $data;
            $this->counter++;
        }
        if(count($getCsvArr) > 0)
        {
            $csvDataArr = array_shift($getCsvArr);
            if($this->csvDataArr) $csvDataArr = $this->csvDataArr;
            
            $counter = 0;
            foreach($getCsvArr as $csvValue)
            {
                $totalRec = count($csvValue);
                for($i = 0; $i < $totalRec ; $i++)
                {
                    $key = $this->csvDataArr ? $csvDataArr[$i] : $this->remove_char($csvDataArr[$i]);
                    if($csvValue[$i]) $this->csvData[$counter][$key] = $this->put_special_char($csvValue[$i]);
                }
                $counter++;
            }
        }
        return $this->csvData;
    }
    
    function put_special_char($value)
    {
        return $this->specialhtml ? str_replace(array('&','" ','\'','<','>'),array('&amp;','&quot;','&#039;','&lt;','&gt;'),$value) : $value;
    }
    
    function remove_char($value)
    {
        $result = $this->removechar == 'manual' ? $this->remove_char_manual($value) : $this->remove_char_auto($value);
        return str_replace(' ','_',trim($result));
    }
    
    private function remove_char_manual($value)
    {
        return str_replace(array('&','"','\'','<','>','(',')','%'),'',trim($value));
    }

    private function remove_char_auto($str,$x=0)
    {
        $x==0 ? $str=$this->make_semiangle($str) : '' ; 
        eregi('[[:punct:]]',$str,$arr);
        $str = str_replace($arr[0],'',$str);
    
        return eregi('[[:punct:]]',$str) ? $this->remove_char_auto($str,1) : $str;
    }
    
    private function make_semiangle($str)
    {
        $arr = array('0' => '0', '1' => '1', '2' => '2', '3' => '3', '4' => '4',
        '5' => '5', '6' => '6', '7' => '7', '8' => '8', '9' => '9',
        'A' => 'A', 'B' => 'B', 'C' => 'C', 'D' => 'D', 'E' => 'E',
        'F' => 'F', 'G' => 'G', 'H' => 'H', 'I' => 'I', 'J' => 'J',
        'K' => 'K', 'L' => 'L', 'M' => 'M', 'N' => 'N', 'O' => 'O',
        'P' => 'P', 'Q' => 'Q', 'R' => 'R', 'S' => 'S', 'T' => 'T',
        'U' => 'U', 'V' => 'V', 'W' => 'W', 'X' => 'X', 'Y' => 'Y',
        'Z' => 'Z', 'a' => 'a', 'b' => 'b', 'c' => 'c', 'd' => 'd',
        'e' => 'e', 'f' => 'f', 'g' => 'g', 'h' => 'h', 'i' => 'i',
        'j' => 'j', 'k' => 'k', 'l' => 'l', 'm' => 'm', 'n' => 'n',
        'o' => 'o', 'p' => 'p', 'q' => 'q', 'r' => 'r', 's' => 's',
        't' => 't', 'u' => 'u', 'v' => 'v', 'w' => 'w', 'x' => 'x',
        'y' => 'y', 'z' => 'z',
        '(' => '(', ')' => ')', '〔' => '[', '〕' => ']', '【' => '[',
        '】' => ']', '〖' => '[', '〗' => ']', '“' => '[', '”' => ']',
        '‘' => '[', '’' => ']', '{' => '{', '}' => '}', '《' => '<',
        '》' => '>',
        '%' => '%', '+' => '+', '—' => '-', '-' => '-', '~' => '-',
        ':' => ':', '。' => '.', '、' => ',', ',' => '.', '、' => '.',
        ';' => ',', '?' => '?', '!' => '!', '…' => '-', '‖' => '|',
        '”' => '"', '’' => '`', '‘' => '`', '|' => '|', '〃' => '"',
        ' ' => ' ','$'=>'$','@'=>'@','#'=>'#','^'=>'^','&'=>'&','*'=>'*');
    
        return strtr($str, $arr);
    }
    
    function __destruct(){
        fclose($this->handler);
    }
}
// example: 
$csv = new csv_to_array('user.csv'); 
echo "<pre>"; print_r($csv->get_array()); echo "</pre>";

2. 使用一般函数

<?
function csv_to_array($csv)
{
	$len = strlen($csv);


	$table = array();
	$cur_row = array();
	$cur_val = "";
	$state = "first item";


	for ($i = 0; $i < $len; $i++)
	{
		//sleep(1000);
		$ch = substr($csv,$i,1);
		if ($state == "first item")
		{
			if ($ch == '"') $state = "we're quoted hea";
			elseif ($ch == ",") //empty
			{
				$cur_row[] = ""; //done with first one
				$cur_val = "";
				$state = "first item";
			}
			elseif ($ch == "\n")
			{
				$cur_row[] = $cur_val;
				$table[] = $cur_row;
				$cur_row = array();
				$cur_val = "";
				$state = "first item";
			}
			elseif ($ch == "\r") $state = "wait for a line feed, if so close out row!";
			else
			{
				$cur_val .= $ch;
				$state = "gather not quote";
			}
			
		}

		elseif ($state == "we're quoted hea")
		{
			if ($ch == '"') $state = "potential end quote found";
			else $cur_val .= $ch;
		}
		elseif ($state == "potential end quote found")
		{
			if ($ch == '"')
			{
				$cur_val .= '"';
				$state = "we're quoted hea";
			}
			elseif ($ch == ',')
			{
				$cur_row[] = $cur_val;
				$cur_val = "";
				$state = "first item";
			}
			elseif ($ch == "\n")
			{
				$cur_row[] = $cur_val;
				$table[] = $cur_row;
				$cur_row = array();
				$cur_val = "";
				$state = "first item";
			}
			elseif ($ch == "\r") $state = "wait for a line feed, if so close out row!";
			else
			{
				$cur_val .= $ch;
				$state = "we're quoted hea";
			}

		}
		elseif ($state == "wait for a line feed, if so close out row!")
		{
			if ($ch == "\n")
			{
				$cur_row[] = $cur_val;
				$cur_val = "";
				$table[] = $cur_row;
				$cur_row = array();
				$state = "first item";

			}
			else
			{
				$cur_row[] = $cur_val;
				$table[] = $cur_row;
				$cur_row = array();
				$cur_val = $ch;
				$state = "gather not quote";
			}	
		}

		elseif ($state == "gather not quote")
		{
			if ($ch == ",")
			{
				$cur_row[] = $cur_val;
				$cur_val = "";
				$state = "first item";
				
			}
			elseif ($ch == "\n")
			{
				$cur_row[] = $cur_val;
				$table[] = $cur_row;
				$cur_row = array();
				$cur_val = "";
				$state = "first item";
			}
			elseif ($ch == "\r") $state = "wait for a line feed, if so close out row!";
			else $cur_val .= $ch;
		}

	}

	return $table;
}

//pass a csv string, get a php array
// example:
$arr = csv_to_array(file_get_contents('user.csv'));
echo "<pre>"; print_r($arr);   echo "</pre>"

或者

<?
$arrCSV = array();
// Open the CSV
if (($handle = fopen("user.csv", "r")) !==FALSE) {
	// Set the parent array key to 0
	$key = 0;
	// While there is data available loop through unlimited times (0) using separator (,)
	while (($data = fgetcsv($handle, 0, ",")) !==FALSE) {
	   // Count the total keys in each row
	   $c = count($data);
	   //Populate the array
	   for ($x=0;$x<$c;$x++) $arrCSV[$key][$x] = $data[$x];
	   $key++;
	} // end while
	// Close the CSV file
	fclose($handle);
} // end if
echo "<pre>"; print_r($arrCSV); echo "</pre>";
?>
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