I'm having a problem to delete files listed in a file. One file name per line
There are not many more than 10 or so listed at any time. It would seem the \n is also being read into the unlink command and showing the error no such filename.
I have tried the recommended rtrim without much luck.
filename
file1.php
file2.php
file3.php
file4.php
etc...
This is the code I'm trying to use.
if(file_exists($filename)) {
$handle = fopen("$filename", "r");
if ($handle) {
while (($line = fgets($handle)) !== false) {
// process the line and delete read file.
unlink("$line");
}
}
else
{
// error opening the file.
}
fclose($handle);
while (($line = fgets($handle)) !== false) {
// process the line and delete read file.
$line = trim($line);
if (strlen($line) && file_exists($line)) {
unlink($line);
}
}
Related
I have a file with keywords on each line. The line starts with number then comma and after that the keyword (like comma separated csv but text file). The file looks like this
7,n00t
41,n01
13,n021
21,n02
18,n03
13,n04
15,n05
13,n06
18,n07
13,n08
14,n09
9,n0a
What I'm trying is to run whole file and hash only the keywords without the number before the comma.
What I'm tried is this.
$savePath = "test-file.txt";
$handle = fopen($savePath, "r+");
if ($handle) {
while (($line = fgets($handle)) !== false) {
$hash1 = substr($line, strpos($line, ",") + 1);
$hash2 = hash('ripemd160', $hash1);
fwrite($handle, $hash2);
}
fclose($handle);
} else {
echo "Can't open the file!";
}
It is working but the problem is that it is hashing the number before the comma and on most of the lines I get one string. This is the output
d743dcc66de14a3430d806aad64a67345fd0b23d0007
75f32ebf42e3ffd70fc3f63d3a61fc6af0075c24000088
7b816ac9cbe2da6a6643538564216e441f55fe9f6,00009
f0ba52b83ffac69fddd8786d6f48e7700562f0170b
def75b09e253faea412f67e67a535595b00366dce
c0da025038ed83c687ddc430da9846ecb97f3998l
c0da025038ed83c687ddc430da9846ecb97f39985,0000r
c12530b4b78bde7bc000e4f15a15bcea013eaf8c
9c1185a5c5e9fc54612808977ee8f548b2258d31,00010
efa60a26277fde0514aec5b51f560a4ba25be3c111
0e25f9d48d432ff5256e6da30ab644d1ca726cb700123
ad6d049d794146aca7a169fd6cb3086954bf2c63012
Should be
7,d743dcc66de14a3430d806aad64a67345fd0b23d0007
41,75f32ebf42e3ffd70fc3f63d3a61fc6af0075c24000088
13,7b816ac9cbe2da6a6643538564216e441f55fe9f6,00009
21,f0ba52b83ffac69fddd8786d6f48e7700562f0170b
18,def75b09e253faea412f67e67a535595b00366dce
13,c0da025038ed83c687ddc430da9846ecb97f3998l
15,c0da025038ed83c687ddc430da9846ecb97f39985,0000r
13,c12530b4b78bde7bc000e4f15a15bcea013eaf8c
18,9c1185a5c5e9fc54612808977ee8f548b2258d31,00010
13,efa60a26277fde0514aec5b51f560a4ba25be3c111
14,0e25f9d48d432ff5256e6da30ab644d1ca726cb700123
9,ad6d049d794146aca7a169fd6cb3086954bf2c63012
Any ideas what is the problem?
The thing is you are reading and writing to the file at the same time. This way, internal pointer is being juggled all the time. Instead, read all the lines, store the result in an array and fseek the file pointer to the beginning of the file again and keep writing the new lines one by one as shown below.
Snippet:
<?php
$handle = fopen("test-file.txt", "r+");
if (!$handle) {
throw new Exception("Can't open file!");
}
$newLines = [];
while (($line = fgets($handle)) !== false) {
$hash = hash('ripemd160', substr($line, strpos($line, ",") + 1));
$newLines[] = substr($line, 0, strpos($line, ",")) . "," . $hash;
}
fseek($handle, 0);
foreach($newLines as $line){
fwrite($handle, $line . "\n");
}
fclose($handle);
The trouble is twofold:
You're trying to write to the file you're reading, while you're reading it without even changing the position of the file pointer, and vice-versa for the reads.
You're trying to overwrite 3-4 bytes of data with 32 bytes of data, which ends up clobbering most of the rest of the input you're trying to read.
If you want to change a file like this you need to create a new file, write your data to that, and then rename the new file to the old one.
Also, use fgetcsv() and fputcsv() to read and write CSV files, otherwise you're going to wind up fighting with edge cases when your input data starts getting complex.
$savePath = "test-file.txt";
$in_h = fopen($savePath, "r+");
$out_h = fopen($savePath.'.new', 'r+');
if ($in_h) {
while (($line = fgetcsv($in_h)) !== false) {
$line[1] = hash('ripemd160', $line[1]);
fputcsv($out_h, $line);
}
fclose($in_h);
fclose($out_h);
rename($savePath.'.new', $savePath);
} else {
echo "Can't open the file!";
}
I want to search for the text Hello (example) in a TXT file whose size is 5GB+ then return the whole line.
I've tried using SplFileObject but what I know is that the line number is required to use SplFileObject, like that:
$linenumber = 2094;
$file = new SplFileObject('myfile.txt');
$file->seek($linenumber-1);
echo $file->current();
But as previously mentioned, I want to search for a string then get the whole line, I don't know the line number.
Any help would be appreciated.
this should work:
<?php
$needle = 'hello';
$count = 1;
$handle = fopen("inputfile.txt", "r");
if ($handle) {
while (($line = fgets($handle)) !== false) {
// process the line read.
$pos = strpos($line, $needle);
if ($pos !== false) {
echo $line . PHP_EOL;
echo "in line: ".$count . PHP_EOL;
break;
}
$count++;
}
fclose($handle);
} else {
// error opening the file.
}
This is the answer that I can use. Thanks a lot to #user3783243
For Linux:
exec('grep "Hello" myfile.txt', $return);
For Windows:
exec('findstr "Hello" "myfile.txt"', $return);
Now $return should contain the whole line.
Unfortunately, this doesn't work if exec() and system() functions are disabled by your server administrator in the php.ini file. But for me it works fine.
If someone have a better solution I'd be glad to know it :)
I need a php script that will open an external php file (from the same server folder), go through it line by line, and then normally display the page in the browser, as it would by just opening the external php page directly.
I need to open the external file line by line, so I can do some processing on the content of the file before showing it.
My current code is:
<?php
$handle = fopen("test.php", "r");
if ($handle) {
while (($line = fgets($handle)) !== false) {
// process the line here, and change if needed
echo "$line\n";
}
fclose($handle);
}
else {
// error opening the file.
}
?>
This works, and the page is displayed, but any php code in the original external file is not honored - it is written out as text, and not rendered by the browser.
I need the external file to fully display, just as it would if I opened the file (in this case "test.php") by itself.
Other questions I have seen on SO deal with opening or displaying a full file at once, but I need to loop through my file and do some processing on the contents first, so need to evaluate it line by line.
Any ideas would be appreciated.
Thanks
I would save the changes to a temporary file, and then include it.
<?php
$handle = fopen("test.php", "r");
if ($handle) {
while (($line = fgets($handle)) !== false) {
// process the line here, and change if needed
$newCode .= "$line\n";
}
fclose($handle);
}
else {
// error opening the file.
}
// temporary file name
$temp_file = tempnam(sys_get_temp_dir(), 'myfile').".php";
// save modified code
file_put_contents($temp_file, $newCode);
// include modified code
include $temp_file;
// delete file
unlink($temp_file);
?>
Retrieve the content, process it, keep it in memory then eval() it:
<?php
$newCode = "";
$handle = fopen("test.php", "r");
if ($handle) {
while (($line = fgets($handle)) !== false) {
// process the line here, and change if needed
//$line = myLineProcess($line);
$newCode .= "$line\n";
}
fclose($handle);
}
else {
// error opening the file.
}
//run the code
eval('?>'.$newCode.'<?php;');
?>
How can I remove a line from a file pointer in PHP?
I open the file using fgets() and not with file() because the file is too big.
The actual problem is: I have 2 very big files. I need to remove all lines from file 1 which exist in file 2.
This is the code:
$handle1 = fopen("1.txt", "r+");
$handle2 = fopen("2.txt", "r");
if ($handle2) {
while (!feof($handle2)) {
$buffer2 = trim(fgets($handle2));
if ($handle1) {
while (!feof($handle1)) {
$buffer1 = trim(fgets($handle1));
if($buffer1 == $buffer2)
// stuck here
}
fclose($handle1);
}
}
fclose($handle2);
}
How the line can be removed?
Thanks!
I am trying to read a CSV file (delimited by commas) but unfortunately, it isn't responding as it ought to. I am not so sure what I am doing wrong here, but I'll paste out the contents of the code and the CSV file both :
$row = 0;
if($handle = fopen("SampleQuizData.csv","r") !== FALSE)
{
// WORKS UNTIL HERE, SO FILE IS BEING READ
while(!feof(handle))
{
$line = fgetcsv($handle, 1024, ",") ;
echo $line[2]; // DOES NOT WORK
}
}
Here is the CSV file: (the emails and names have been changed here to protect the identities of the users)
parijat,something,parijatYkalia#hotmail.com
matthew,durp, mdurpdurp#gmail.com
steve,vai,stevevai#gmail.com
rajni,kanth,rajnikanth#superman.com
it lacks a '$' to the handle variable
while(!feof($handle)){
and not :
while(!feof(handle)){
Give this a try:
<?php
$row = 0;
if (($handle = fopen("SampleQuizData.csv", "r")) !== FALSE)
{
while(!feof($handle))
{
$line = fgetcsv($handle, 1024, ",") ;
echo "$line[2]";
}
}
?>
It's worth a mention but when I was working on CSV exports a few weeks ago, I had weird line ending inconsistencies. So I put this at the top of my php file and it worked splendid.
<?php
ini_set("auto_detect_line_endings", true);
?>