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$arrCon = explode("\r\n", $xxx);
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PHP code:

$filename = "./1.txt";
$txt = file($filename);
if($txt===false){
exit("¶Áȡʧ°Ü");
}
echo "µÚ3ÐÐΪ:{$txt[2]}<br>";
//Ìæ»»¿ªÊ¼···
$txt[2] = "Ìæ»»×Ö·û´®\r\n";
WriteTo($txt,$filename);
function WriteTo($txt,$filename){
$str = join($txt);
if (is_writable($filename)) {
if (!$handle = fopen($filename, 'w')) {
echo "²»ÄÜ´ò¿ªÎļþ $filename";
exit;
}
if (fwrite($handle, $str) === FALSE) {
echo "²»ÄÜдÈëµ½Îļþ $filename";
exit;
}
echo "³É¹¦µØ½«Ð´Èëµ½Îļþ$filename";
fclose($handle);
} else {
echo "Îļþ $filename ²»¿Éд";
}
}



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