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$name = '名称';
$age = '年龄';
$file_name = "aa.txt";
$strnum = strlen(file_get_contents($file_name));
$fp=fopen($file_name,'r');
while(!feof($fp))
{
$buffer=fgets($fp,$strnum);
$buffer = !empty($name) ? str_replace("{:name}","$name",$buffer) : $buffer; //替换内容
$buffer = !empty($age) ? str_replace("{:age}","$age",$buffer) : $buffer; //替换内容
echo $buffer."
";
}
fclose($fp);
?>