I have a CSV file whose contents are as below.
1 2 3 4 \t 45 56 67
As seen above, after the value 4, I have a tab space. I need to read the values only till tab space. I am able to open the CSV file and read till tab delimiter as below.
$file = fopen("outputfile.csv","r");
//I am reading till tab space.
while ($line = fgetcsv($file, 0, "\t") !== false)
However, now I need to read all the values till tab space into PHP array for some manipulation. How can I achieve the same?
Try:
while ($line = fgetcsv($file, 0, "\t") !== false) {
$columns = str_getcsv($line, ' '); //or use explode()
}
explode() is the way to go.
$file = fopen("outputfile.csv","r");
while ($line = fgetcsv($file, 0, "\t") !== false)
{
$array = explode(' ', $line);
}
I would split the line into "before tab" and "after tab" components, and only do the parsing on the "before tab" half:
$file = fopen("outputfile.csv","r");
// for each line in the file, until EOF
while( ($line = fgets($file)) !== false) {
// split out the tab char:
$beforeTab = explode( "\t", $line)[0];
// now, parse the CSV part
$parsedCSV = str_getcsv( $beforeTab);
// do what you need with the parsedCSV array.
}
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 am having difficulties with extracting specific text from a text file. I have tried many different ways like using fopen or file to open the file but this wont allow me to use any of the string functions. So i have decided to use file_get_contents and extract the text i want with the string methods as follows:
<?php
$data = [];
$file =
file_get_contents("data.txt", 0, NULL, 148);
list($id, $data_names) = preg_split('[:]', $file);
array_push($names, $data_names);
echo $emails[0];
?>
I used preg_split to split the text i want at a specific character (:) and i put the data in an array. Which worked for the first line but i don't know how to go about doing it for the rest of the lines, i've tried a while loop but that just ends up in an infinite loop.
data.txt formatted like this:
1:hannah.Smith
2:Bob.jones
3:harry.white
....
Any suggestions on how to do this or a better approach would be greatly appreciated.
There is a function for that. This isn't CSV but change the delimiter. To just get the names:
$handle = fopen("data.txt", "r"));
while(($line = fgetcsv($handle, 0, ":")) !== FALSE) {
$names[] = $line[1];
}
To index the names by the ids:
while(($line = fgetcsv($handle, 0, ":")) !== FALSE) {
$names[$line[0]] = $line[1];
}
To get the ids and names in a multidimensional array, use:
while(($names[] = fgetcsv($handle, 0, ":")) !== FALSE) {}
Well you are not assigning the return value of file_get_contents to a variable. So the contents of the file are not being used.
You can use the file function. It reads the contents of a file to an array. Each element of the array is a line in the file. You can then loop over the array and parse each line. For example:
$names = array();
$file = file_get_contents("data.txt");
for ($count = 0; $count < count($file); $count++) {
list($id, $name) = $file[$count];
$names[] = $name;
}
/** print the contents of the names array */
print_R($names);
I have the following code, that I use to read a csv file with CRLF as lines endings
if (($fp = fopen($path, "r")) !== FALSE) {
while (($record = fgetcsv($fp, 1000, "\r\n")) !== FALSE) {
if ($row == 0) {
$record[0] = $batchHeader;
}
$newCsvData[] = $record;
$row++;
}
}
When I upload the csv file I get the following error: fgetcsv(): delimiter must be a single character
Here is a sample or my csv:
Thanks.
I'm guessing it reads "\r\n" as your delimiter. Have you tried fgetcsv($fp, 1000, "|") ?
It should auto-detect line endings.
PHP reference
The parameter in question is the delimiter (field separator), not the row separator. In your case, |should be your delimiter. The function will handle line endings itself.
Take a read for more information at http://php.net/manual/en/function.fgetcsv.php
I have an issue in my php script which I don't understand. I know there are several questions regarding this issue but none fits to my issue.
I actually have one input file delimited by tabulation named testfile.txt.
With this txt file, I create a new file named result.txt where I take content of testfile in column 0 and column 7.
When I execute my php script, I get this error:
Notice: Undefined offset: 7
The thing that I don't understand is, my result.txt is well created with data contained in my column 0 and 7 from my testfile.txt. If I do:
echo $dataFromTestFile[7];
I have in output contents in column 7.
So I don't really understand why I have this notice and how to remove it.
Here's my php script:
<?php
if (false !== ($ih = fopen('/opt/lampp/htdocs/ngs/tmp/testfile.txt', 'r'))) {
$oh = fopen('/opt/lampp/htdocs/ngs/tmp/result.txt', 'w');
while (false !== ($dataFromTestFile = fgetcsv($ih,0,"\t"))) {
// this is where I build my new row
$outputData = array($dataFromTestFile[0], $dataFromTestFile[7]);
fputcsv($oh, $outputData);
//echo $dataFromTestFile[7];
}
fclose($ih);
fclose($oh);
}
?>
Sample data of testfile.txt:
Input Errors AccNo Genesymbol Variant Reference Coding Descr. Coding
aaa ddd fdfd dfdf fefefd ref1 fdfdfd fdfdf dfdfde
I suspect this is the line that's causing the error:
$outputData = array($dataFromTestFile[0], $dataFromTestFile[7]);
You are trying to use array elements at specific index without checking if they actually exists.
Also, you are trying to write an array object to the result file, did you mean to create a comma separated value in that file?
Try this:
$source = '/opt/lampp/htdocs/ngs/tmp/testfile.txt';
$result = '/opt/lampp/htdocs/ngs/tmp/result.txt';
if (($handle = fopen($source, "r")) !== FALSE) {
while (($data = fgetcsv($handle, 1000, "\t")) !== FALSE) {
if (isset($data[0]) && isset($data[7])) {
file_put_contents($result, $data[0] .','. $data[7] ."\r\n");
}
}
fclose($handle);
}
Alternatively, you could write the result as a csv like this also:
$sourceFile = '/opt/lampp/htdocs/ngs/tmp/testfile.txt';
$resultFile = '/opt/lampp/htdocs/ngs/tmp/result.txt';
$resultData = array();
// Parse source file
if (($handle = fopen($sourceFile, "r")) !== FALSE) {
while (($data = fgetcsv($handle, 1000, "\t")) !== FALSE) {
if (isset($data[0]) && isset($data[7])) {
$resultData[] = array($data[0], $data[7]);
}
}
fclose($handle);
}
// Write result file
if (sizeof($resultData)) {
$h = #fopen($resultFile, 'w');
if (!$h) {
exit('Failed to open result file for writing.');
}
foreach ($resultData as $resultRow) {
fputcsv($h, $resultRow, ',', '"');
}
fclose($h);
}
make sure the column 7 exists in your testfile.txt - i guess when starting from zero it may be column number 6 - also you can
var_dump($dataFromTestFile)
in order to get the content of the variable - array keys and values might be of interest for your issue
I have a text file that stores lastname, first name, address, state, etc as a string with a | delimiter and each record on a separate line.
I have the part where I need to store each record on a new line and its working fine; however, now I need to be able to go back and update the name or address on a particular line and I can't get it to work.
This how to replace a particular line in a text file using php? helped me here but I am not quite there yet. This overwrites the whole file and I lose the records. Any help is appreciated!
After some edit seems to be working now. I am debugging to see if any errors.
$string= implode('|',$contact);
$reading = fopen('contacts.txt', 'r');
$writing = fopen('contacts.tmp', 'w');
$replaced = false;
while (!feof($reading)) {
$line = fgets($reading);
if(stripos($line, $lname) !== FALSE) {
if(stripos($line, $fname) !== FALSE) {
$line = "$string";
$replaced = true;
}
}
fwrite($writing, "$line");
//fputs($writing, $line);
}
fclose($reading); fclose($writing);
// might as well not overwrite the file if we didn't replace anything
if ($replaced)
{
rename('contacts.tmp', 'contacts.txt');
} else {
unlink('contacts.tmp');
}
It seems that you have a file in csv-format. PHP can handle this with fgetcsv() http://php.net/manual/de/function.fgetcsv.php
if (($handle = fopen("contacts.txt", "r")) !== FALSE) {
$data = fgetcsv($handle, 1000, '|')
/* manipulate $data array here */
}
fclose($handle);
So you get an array that you can manipulate. After this you can save the file with fputcsv http://www.php.net/manual/de/function.fputcsv.php
$fp = fopen('contacts.tmp', 'w');
foreach ($data as $fields) {
fputcsv($fp, $fields);
}
fclose($fp);
Well, after the comment by Asad, there is another simple answer. Just open the file in Append-mode http://de3.php.net/manual/en/function.fopen.php :
$writing = fopen('contacts.tmp', 'a');