我需要打开一个文本文件并替换一个字符串。我需要这个
Old String: <span id="$msgid" style="display: block;">
New String: <span id="$msgid" style="display: none;">
这是我到目前为止所拥有的,但除了额外的空格之外,我没有看到文本文件有任何变化。
$msgid = $_GET['msgid'];
$oldMessage = "";
$deletedFormat = "";
// Read the entire string
$str = implode("\n", file('msghistory.txt'));
$fp = fopen('msghistory.txt', 'w');
// Replace something in the file string - this is a VERY simple example
$str = str_replace("$oldMessage", "$deletedFormat", $str);
fwrite($fp, $str, strlen($str));
fclose($fp);
我该怎么做?
这个有用吗:
$msgid = $_GET['msgid'];
$oldMessage = '';
$deletedFormat = '';
//read the entire string
$str=file_get_contents('msghistory.txt');
//replace something in the file string - this is a VERY simple example
$str=str_replace($oldMessage, $deletedFormat,$str);
//write the entire string
file_put_contents('msghistory.txt', $str);
感谢您的评论。我创建了一个函数,当发生错误时会给出错误消息:
/**
* Replaces a string in a file
*
* @param string $FilePath
* @param string $OldText text to be replaced
* @param string $NewText new text
* @return array $Result status (success | error) & message (file exist, file permissions)
*/
function replace_in_file($FilePath, $OldText, $NewText)
{
$Result = array('status' => 'error', 'message' => '');
if(file_exists($FilePath)===TRUE)
{
if(is_writeable($FilePath))
{
try
{
$FileContent = file_get_contents($FilePath);
$FileContent = str_replace($OldText, $NewText, $FileContent);
if(file_put_contents($FilePath, $FileContent) > 0)
{
$Result["status"] = 'success';
}
else
{
$Result["message"] = 'Error while writing file';
}
}
catch(Exception $e)
{
$Result["message"] = 'Error : '.$e;
}
}
else
{
$Result["message"] = 'File '.$FilePath.' is not writable !';
}
}
else
{
$Result["message"] = 'File '.$FilePath.' does not exist !';
}
return $Result;
}
这就像一个魅力,快速而准确:
function replace_string_in_file($filename, $string_to_replace, $replace_with){
$content=file_get_contents($filename);
$content_chunks=explode($string_to_replace, $content);
$content=implode($replace_with, $content_chunks);
file_put_contents($filename, $content);
}
用途:
$filename="users/data/letter.txt";
$string_to_replace="US$";
$replace_with="Yuan";
replace_string_in_file($filename, $string_to_replace, $replace_with);
// 当涉及到字符串解析时,永远不要忘记 EXPLODE // 这是一个强大而快速的工具
public function fileReplaceContent($path, $oldContent, $newContent)
{
$str = file_get_contents($path);
$str = str_replace($oldContent, $newContent, $str);
file_put_contents($path, $str);
}
使用
fileReplaceContent('your file path','string you want to change', 'new string')
对 Rachid 出色的最佳答案进行了轻微修改:
/* --------------------------------------------------------------
function to open a file [$path] and replace content in it
[$oldContent] with [$newContent] and return the altered content
--------------------------------------------------------------- */
function fileReplaceContent($path, $oldContent, $newContent)
{
// Check if the file exists and is readable
if(!file_exists($path) || !is_readable($path))
{
return [false, "File [" . $path . "] does not exist or is not readable."];
}
$content = file_get_contents($path); // Read the content of the file
if($content === false)
{
return [false, "Error opening or reading file at [" . $path . "]"];
}
if (!is_writable($path)) // file can't be written to
{
return [false, "File [" . $path . "] is not writable."];
}
// Replace the text
$modifiedContent = str_replace($oldContent, $newContent, $content);
return $modifiedContent;
}