php csv to array(csv 转数组)方法与代码

发布时间:2019-09-08编辑:脚本学堂
本文介绍下如何将csv文件转成array数组,多种实现方法,有需要的朋友,可以参考下。

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:
 

复制代码 代码示例:
<?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 ?
     *  edit http://www.jb200.com
     */ 
    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
 

复制代码 代码示例:
<? 
    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
 

复制代码 代码示例:
<? 
    $arrCSV = array(); 
    // Open the CSV 
    if (($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>"; 
?>

至于哪种更好用,看自己的实际需求与个人爱好了,实际工作中csv转array的需求还是不少,建议大家多练习,多掌握。