Judgment and execution code for opening, closing and writing PHP files_PHP tutorial

How to accurately control and judge has become a "small problem" in PHP. The following is a sentence excerpted from the book.

Copy code The code is as follows:

<?php
$filename = "html/cache.txt";
$contents = "I am Zhang Bin";
if(is_writable($filename)){
if(($handle = fopen($filename,"a") )== ​​false){
echo "Failed to write file $filename";
exit();
}
if(fwrite($handle,$contents) == false){
echo "Write to file$ filename failed";
exit();
}
echo "Writing file $filename succeeded";

fclose($handle);
}else{
echo "File $filename cannot be written";
}
?>

Programming section: Pay attention to the symbols in the Chinese and English input methods, especially after Chinese ";"!

http://www.bkjia.com/PHPjc/323486.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/323486.htmlTechArticleHow to accurately control and judge has become a "small problem" in PHP. The following is excerpted from the book statement. Copy the code The code is as follows: ?php $filename = "html/cache.txt"; $conten...