PHP read file contents and write data to file _php tutorial

PHP read the contents of the file and write data to the file here is the main line of writing data to a file, also a line to read the contents of the file.

PHP Tutorials Read file content and write data to a file
Here is the main line of writing data to a file, but also a line to read the contents of the file.
*/

$fp = fopen ($_server[' document_root '). " /.. /data/info.dat ", ' R ');

if (! $fp)
{
echo "Error: Open file error, please check the directory is correct, or try again later!" ";
Exit
}

while (!feof ($FP))
{
$line = fgets ($FP);
Echo $line;
Echo '
';
}

Fclose ($FP);

Write a file

$file = "Data.txt";
$content = "Content title RNWWW.BKJIA.COMRN content second line"; What to write

if (! $fp = fopen ($file, ' a '))//When opening file $file, use append mode, at which point the file pointer is at the beginning of the file
{
echo "Open file $file failed!" ";
Exit
}

if (fwrite ($fp, $content) = = = False)//write content to file
{
echo "Failed to write to file! ";
Exit
}

echo "wrote the file successfully! ";
Fclose ($FP);

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