ajax1.html三個(gè)ajax方法同時(shí)訪問(wèn)ajax1.php,ajax1.php中有進(jìn)行文件data.php讀寫(xiě)，由于三個(gè)ajax方法訪問(wèn)頻率特別高，就產(chǎn)生了并發(fā)訪問(wèn)，導(dǎo)致讀寫(xiě)出錯(cuò)，使用了flock()還是會(huì)出錯(cuò)，請(qǐng)高手們指導(dǎo)一下怎么解決呢？

ajax1.html代碼：

var a = 1;
var b = 1;
var c = 1;
function ajax1(){
    $.get('ajax1.php?from=a&value='+a, function(res){
        $('#ajax1').text(a);
        a++;
        if(res == 1){
            ajax1();
        }
    });
}
function ajax2(){
    $.get('ajax1.php?from=b&value='+b, function(res){
        $('#ajax2').text(b);
        b++;
        if(res == 1){
            ajax2();
        }
    });
}
function ajax3(){
    $.get('ajax1.php?from=c&value='+c, function(res){
        $('#ajax3').text(c);
        c++;
        if(res == 1){
            ajax3();
        }
        
    });
}

function beginAjax(){
    ajax1();
    ajax2();
    ajax3();
}

ajax1.php代碼：

$from = $_GET['from'];
$value = $_GET['value'];

$data = is_array(include 'data.php')? include 'data.php': array();

$data[] = $from .'-'. $value;

$file = fopen('data.php', 'w');
$lock = flock($file, LOCK_EX);
if($lock){
    fwrite($file, '<?php');
    fwrite($file, PHP_EOL);
    fwrite($file, 'return ');
    fwrite($file, var_export($data, true));
    fwrite($file, ';');
    flock($file, LOCK_UN);
}
fclose($file);
exit('1');

data.php代碼（以下數(shù)據(jù)是出錯(cuò)了的數(shù)據(jù)）：

return array (
  0 => 'b-3',
);1 => 'a-1',
  2 => 'c-1',
  3 => 'b-2',
  4 => 'a-2',
  5 => 'c-2',
);