php file_put_contents 函数
php file_put_contents 函数
file_put_contents
( PHP 5中)
file_put_contents -写一个字符串到一个文件
描述
国际file_put_contents (字符串$文件名,混合$数据[摘要$国旗= 0 [ ,资源$背景] ] )
这一功能是相同的要求fopen ( )函数, fwrite ( )和fclose ( )先后将数据写入一个文件。
如果文件不存在,该文件的创建。否则,现有的文件被覆盖,除非FILE_APPEND旗帜设置。
参数
文件名
文件路径在哪里写的数据。
数据
这些数据给我们写信。可以是一个字符串,数组或流资源(上面解释) 。
如果数据流的资源,剩下的缓冲区的流将被复制到指定的文件。这是类似使用stream_copy_to_stream ( ) 。
您还可以指定数据参数作为一个单一的层面阵列。这相当于file_put_contents ( $文件名,爆( '' , $阵列) ) 。
旗帜
国旗的价值可任意组合下列旗帜(与一些限制) ,加入的二进位或( | )操作符。
可悬挂国旗描述
FILE_USE_INCLUDE_PATH搜索文件名中包含目录。见include_path中获取更多信息。
FILE_APPEND如果档案filename已经存在,附加数据的文件,而不是覆盖它。
LOCK_EX获得独占锁定的文件,同时着手写作。
FILE_TEXT数据写入的文字模式。如果已启用的Unicode语义,默认字符编码是UTF - 8 。您可以指定一个不同的编码,建立一个自定义的范围内或使用stream_default_encoding ( )来更改默认的。此标志不能用于FILE_BINARY 。此标志只适用于自PHP 6 。
FILE_BINARY数据将被写入二进制模式。这是默认设置,并不能用于FILE_TEXT 。此标志只适用于自PHP 6 。
背景
资源的有效范围内建立stream_context_create ( ) 。
返回值
该函数返回的字节数是写入文件,或FALSE的失败。
实例
例如# 1使用简单的例子
$file = 'people.txt';
// Open the file to get existing content
$current = file_get_contents($file);
// Append a new person to the file
$current .= "John Smithn";
// Write the contents back to the file
file_put_contents($file, $current);
?>
$file = 'people.txt';
// The new person to add to the file
$person = "John Smithn";
// Write the contents to the file,
// using the FILE_APPEND flag to append the content to the end of the file
// and the LOCK_EX flag to prevent anyone else writing to the file at the same time
file_put_contents($file, $person, FILE_APPEND | LOCK_EX);
?>

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