php filesystem file system function usage-PHP Tutorial-php.cn

php filesystem file system function usage

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Release： 2016-07-25 08:54:26

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$path = "/home/httpd/phpha.com/index.php";
echo basename($path);
echo basename($path, '.php');
echo basename($path, '.xxx');
echo dirname($path);
?>
//Result:
index.php
index
index.php
/home/httpd/phpha.com

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Note: If the file name ends with the correct suffix, this part will also be removed. chgrp — change the group a file belongs to chown — change the owner of a file chmod — change file mode bool chmod ( string $filename , int $mode )

Example 2:

chmod('/home/phpha.txt', 0755);
?>

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copy — copy file

if(copy('index.php', 'index.php.bak')){
echo 'copy success';
}
?>
//The index survived in the current directory. php.bak file

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delete — see unlink or unset

unlink — delete files Example 3:

if(unlink('index.php.bak')){
echo 'unlink success';
}
?>
//Deleted index.php.bak

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disk_free_space — Returns the free space in a directory disk_total_space — Returns the total disk size of a directory diskfreespace — alias for disk_free_space

Example 4:

//Under Windows:
echo disk_free_space("C:"), '
';
echo disk_total_space("C:");
?>

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///Result: The number of bytes returned 17433419776 32218386432 fopen — open a file or URL fgets — Read a line from a file pointer feof — Tests whether the file pointer reaches the end of the file fread — read a file (safe for binary files) fwrite — write to a file (safe for binary files) fclose — Close an open file pointer

Example 5:

$fp = fopen('hello.txt', 'r'); //Open a file
$n = 1;
while(!feof($fp)){
echo $n, ' - ', fgets($fp), '
'; //Read a line and output
$n++;
}
fclose($fp); //Close the file
?> ;

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//Output: 1 - Welcome to my blog: 2 - http://bbs.it-home.org fgetc — Read characters from a file pointer fgetcsv — Read a line from a file pointer and parse CSV fields fgetss — Read a line from a file pointer and filter out HTML tags fputcsv — Format rows to CSV and write a file pointer fputs — alias for fwrite

$fp = fopen('hello.txt', 'r');
while(false !== ($char = fgetc($fp))){
echo $char , '-';
}
?>
//Output:
W-e-l-c-o-m-e- -t-o- -m-y- -b-l-o-g-:- - -h-t-t-p-:-/-/-b-l-o-g-.-p-h-p-h-a-.-c-o-m-

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