PHP Read Text File

[tlpell]

Hey, read some tips/pointers on PHP.net but can't seem to solve this
problem. I have a php page that reads the contents of a file and then
displays the last XX lines of the file. Problem is this...whenever
the file gets larger that ~5MB, the page just displays nothing, as
though a timeout has occurred but I get no error. At 4.8MB (last
confirmed size)...the function still works. Any ideas what code below
is lacking??

<?
$handle= fopen("/var/log/myfile", "r");
if ($handle) {
while (!feof($handle) ) {
$arrLog[] = fgets($handle, 4096);
}
fclose($handle) ;
}

$int_number_of_ lines = count($arrLog);
if ($int_number_of _lines == 0)
{
echo '<p><strong>No lines read.</strong></p>';
}
if ($int_number_of _lines < $int_lines)
{
$int_lines = $int_number_of_ lines;
}
$int_firstline = $int_number_of_ lines - $int_lines;
echo 'Showing the last '.$int_lines.' lines out of '.
$int_number_of_ lines.'<BR />';
echo "<TABLE WIDTH=100% CLASS=\"mail\"> \n";
for ($i=$int_firstl ine; $i<$int_number_ of_lines; $i++)
{
echo "<TR><TD>".$arr Log[$i]."</TR></TD>\n";
}
echo "</TABLE>\n";

?>

[=?ISO-8859-15?Q?Iv=E1n_S=E1nchez_Ortega?=]

tl****@gmail.co m wrote:

Hey, read some tips/pointers on PHP.net but can't seem to solve this
problem. I have a php page that reads the contents of a file and then
displays the last XX lines of the file.

<?php
passthru("tail -n $lines $file");
?>

Cheers,
--
----------------------------------
Iván Sánchez Ortega -ivansanchez-algarroba-escomposlinux-punto-org-

Proudly running Debian Linux with 2.6.24-1-amd64 kernel, KDE 3.5.9, and PHP
5.2.5-3 generating this signature.
Uptime: 00:28:14 up 10 days, 15:27, 2 users, load average: 0.89, 0.35,
0.18

[Krustov]

<comp.lang.ph p>
<>
<Sat, 19 Apr 2008 14:09:39 -0700 (PDT)>
<ce************ *************** *******@a70g200 0hsh.googlegrou ps.com>

Hey, read some tips/pointers on PHP.net but can't seem to solve this
problem. I have a php page that reads the contents of a file and then
displays the last XX lines of the file. Problem is this...whenever
the file gets larger that ~5MB, the page just displays nothing, as
though a timeout has occurred but I get no error. At 4.8MB (last
confirmed size)...the function still works. Any ideas what code below
is lacking??

$build="/var/log/myfile";
$contents=file_ get_contents($b uild);
$demo=explode(" \n",$contents );

Something like the above might be worth a try .
For the benefit of any newbies .....

The above reads in the file in the one go and $demo in effect becomes
$demo[0] $demo[1] $demo[2] etc etc via the explode command - the
advantage being the above code is much faster than reading in the text
file one line at a time .
--
www.krustov.co.uk

[venti]

On Apr 19, 5:09 pm, [e-mail] m wrote:

Hey, read some tips/pointers on PHP.net but can't seem to solve this
problem. I have a php page that reads the contents of a file and then
displays the last XX lines of the file. Problem is this...whenever
the file gets larger that ~5MB, the page just displays nothing, as
though a timeout has occurred but I get no error. At 4.8MB (last
confirmed size)...the function still works. Any ideas what code below
is lacking??

<?
$handle= fopen("/var/log/myfile", "r");
if ($handle) {
while (!feof($handle) ) {
$arrLog[] = fgets($handle, 4096);
}
fclose($handle) ;

}

$int_number_of_ lines = count($arrLog);
if ($int_number_of _lines == 0)
{
echo '<p><strong>No lines read.</strong></p>';}

if ($int_number_of _lines < $int_lines)
{
$int_lines = $int_number_of_ lines;}

$int_firstline = $int_number_of_ lines - $int_lines;
echo 'Showing the last '.$int_lines.' lines out of '.
$int_number_of_ lines.'<BR />';

echo "<TABLE WIDTH=100% CLASS=\"mail\"> \n";
for ($i=$int_firstl ine; $i<$int_number_ of_lines; $i++)
{
echo "<TR><TD>".$arr Log[$i]."</TR></TD>\n";
}
echo "</TABLE>\n";

?>

The problem is probably due to the php.ini configuration of
max_execution_t ime. I forget the default but it's about 30 seconds.
Try jacking the value up and see if it keeps executing. Though any
script which takes more than 30 seconds is probably not the best
solution either. Consider dumping the lines into a mysql table and
searching that way.

[Jerry Stuckle]

tl****@gmail.co m wrote:

Hey, read some tips/pointers on PHP.net but can't seem to solve this
problem. I have a php page that reads the contents of a file and then
displays the last XX lines of the file. Problem is this...whenever
the file gets larger that ~5MB, the page just displays nothing, as
though a timeout has occurred but I get no error. At 4.8MB (last
confirmed size)...the function still works. Any ideas what code below
is lacking??

<?
$handle= fopen("/var/log/myfile", "r");
if ($handle) {
while (!feof($handle) ) {
$arrLog[] = fgets($handle, 4096);
}
fclose($handle) ;
}

$int_number_of_ lines = count($arrLog);
if ($int_number_of _lines == 0)
{
echo '<p><strong>No lines read.</strong></p>';
}
if ($int_number_of _lines < $int_lines)
{
$int_lines = $int_number_of_ lines;
}
$int_firstline = $int_number_of_ lines - $int_lines;
echo 'Showing the last '.$int_lines.' lines out of '.
$int_number_of_ lines.'<BR />';
echo "<TABLE WIDTH=100% CLASS=\"mail\"> \n";
for ($i=$int_firstl ine; $i<$int_number_ of_lines; $i++)
{
echo "<TR><TD>".$arr Log[$i]."</TR></TD>\n";
}
echo "</TABLE>\n";

?>

Probably running out of memory in PHP...

--
=============== ===
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
js*******@attgl obal.net
=============== ===

[tlpell]

On Apr 19, 5:28 pm, Iván Sánchez Ortega <ivansanchez-...@rroba-
escomposlinux.-.punto.-.orgwrote:

[e-mail] m wrote:

Hey, read some tips/pointers on PHP.net but can't seem to solve this
problem. I have a php page that reads the contents of a file and then
displays the last XX lines of the file.

<?php
passthru("tail -n $lines $file");
?>

Cheers,
--
----------------------------------
Iván Sánchez Ortega -ivansanchez-algarroba-escomposlinux-punto-org-

Proudly running Debian Linux with 2.6.24-1-amd64 kernel, KDE 3.5.9, and PHP
5.2.5-3 generating this signature.
Uptime: 00:28:14 up 10 days, 15:27, 2 users, load average: 0.89, 0.35,
0.18

First, thank you for offering suggestions. I'll research using tail
but my initial problem with it is that it doesn't create an arrary
where I can display each line on a table row but I may be doing
something wrong...

$myfile = "/var/log/maillog";
$arrLog[]=passthru("tail -n $int_lines $myfile");

$int_number_of_ lines = count($myfile);
if ($int_number_of _lines == 0)
{
echo '<p><strong>No lines read.</strong></p>';
}
if ($int_number_of _lines < $int_lines)
{
$int_lines = $int_number_of_ lines;
}
$int_firstline = $int_number_of_ lines - $int_lines;
echo 'Showing the last '.$int_lines.' lines out of '.
$int_number_of_ lines.'<BR />';
echo "<TABLE WIDTH=100% CLASS=\"mail\"> \n";
for ($i=$int_firstl ine; $i<$int_number_ of_lines; $i++)
{
echo "<TR><TD>".$arr Log[$i]."</TR></TD>\n";
}
echo "</TABLE>\n";

[tlpell]

On Apr 19, 6:56 pm, venti <timgreg...@shi eldinvestmentgr oup.com>
wrote:

On Apr 19, 5:09 pm, [e-mail] m wrote:

Hey, read some tips/pointers on PHP.net but can't seem to solve this
problem. I have a php page that reads the contents of a file and then
displays the last XX lines of the file. Problem is this...whenever
the file gets larger that ~5MB, the page just displays nothing, as
though a timeout has occurred but I get no error. At 4.8MB (last
confirmed size)...the function still works. Any ideas what code below
is lacking??

<?
$handle= fopen("/var/log/myfile", "r");
if ($handle) {
while (!feof($handle) ) {
$arrLog[] = fgets($handle, 4096);
}
fclose($handle) ;

}

$int_number_of_ lines = count($arrLog);
if ($int_number_of _lines == 0)
{
echo '<p><strong>No lines read.</strong></p>';}

if ($int_number_of _lines < $int_lines)
{
$int_lines = $int_number_of_ lines;}

$int_firstline = $int_number_of_ lines - $int_lines;
echo 'Showing the last '.$int_lines.' lines out of '.
$int_number_of_ lines.'<BR />';

echo "<TABLE WIDTH=100% CLASS=\"mail\"> \n";
for ($i=$int_firstl ine; $i<$int_number_ of_lines; $i++)
{
echo "<TR><TD>".$arr Log[$i]."</TR></TD>\n";
}
echo "</TABLE>\n";

?>

The problem is probably due to the php.ini configuration of
max_execution_t ime. I forget the default but it's about 30 seconds.
Try jacking the value up and see if it keeps executing. Though any
script which takes more than 30 seconds is probably not the best
solution either. Consider dumping the lines into a mysql table and
searching that way.

Thanks, but the page returns blank instantly...no time out.

[tlpell]

On Apr 19, 6:56 pm, venti <timgreg...@shi eldinvestmentgr oup.com>
wrote:

On Apr 19, 5:09 pm, [e-mail] m wrote:

Hey, read some tips/pointers on PHP.net but can't seem to solve this
problem. I have a php page that reads the contents of a file and then
displays the last XX lines of the file. Problem is this...whenever
the file gets larger that ~5MB, the page just displays nothing, as
though a timeout has occurred but I get no error. At 4.8MB (last
confirmed size)...the function still works. Any ideas what code below
is lacking??

<?
$handle= fopen("/var/log/myfile", "r");
if ($handle) {
while (!feof($handle) ) {
$arrLog[] = fgets($handle, 4096);
}
fclose($handle) ;

}

$int_number_of_ lines = count($arrLog);
if ($int_number_of _lines == 0)
{
echo '<p><strong>No lines read.</strong></p>';}

if ($int_number_of _lines < $int_lines)
{
$int_lines = $int_number_of_ lines;}

$int_firstline = $int_number_of_ lines - $int_lines;
echo 'Showing the last '.$int_lines.' lines out of '.
$int_number_of_ lines.'<BR />';

echo "<TABLE WIDTH=100% CLASS=\"mail\"> \n";
for ($i=$int_firstl ine; $i<$int_number_ of_lines; $i++)
{
echo "<TR><TD>".$arr Log[$i]."</TR></TD>\n";
}
echo "</TABLE>\n";

?>

The problem is probably due to the php.ini configuration of
max_execution_t ime. I forget the default but it's about 30 seconds.
Try jacking the value up and see if it keeps executing. Though any
script which takes more than 30 seconds is probably not the best
solution either. Consider dumping the lines into a mysql table and
searching that way.

Thanks, but the page returns blank instantly...no time out.

[Jerry Stuckle]

tl****@gmail.co m wrote:

On Apr 19, 6:56 pm, venti <timgreg...@shi eldinvestmentgr oup.com>
wrote:

>On Apr 19, 5:09 pm, [e-mail] m wrote:

>>Hey, read some tips/pointers on PHP.net but can't seem to solve this
problem. I have a php page that reads the contents of a file and then
displays the last XX lines of the file. Problem is this...whenever
the file gets larger that ~5MB, the page just displays nothing, as
though a timeout has occurred but I get no error. At 4.8MB (last
confirmed size)...the function still works. Any ideas what code below
is lacking??
<?
$handle= fopen("/var/log/myfile", "r");
if ($handle) {
while (!feof($handle) ) {
$arrLog[] = fgets($handle, 4096);
}
fclose($handle) ;
}
$int_number_o f_lines = count($arrLog);
if ($int_number_of _lines == 0)
{
echo '<p><strong>No lines read.</strong></p>';}
if ($int_number_of _lines < $int_lines)
{
$int_lines = $int_number_of_ lines;}
$int_firstlin e = $int_number_of_ lines - $int_lines;
echo 'Showing the last '.$int_lines.' lines out of '.
$int_number_o f_lines.'<BR />';
echo "<TABLE WIDTH=100% CLASS=\"mail\"> \n";
for ($i=$int_firstl ine; $i<$int_number_ of_lines; $i++)
{
echo "<TR><TD>".$arr Log[$i]."</TR></TD>\n";
}
echo "</TABLE>\n";
?>

The problem is probably due to the php.ini configuration of
max_execution_ time. I forget the default but it's about 30 seconds.
Try jacking the value up and see if it keeps executing. Though any
script which takes more than 30 seconds is probably not the best
solution either. Consider dumping the lines into a mysql table and
searching that way.

Thanks, but the page returns blank instantly...no time out.

Enable errors and display them. You'll see your problem.

In your php.ini file, put:

error_reporting = E_ALL
display_errors = on

--
=============== ===
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
js*******@attgl obal.net
=============== ===

[Jerry Stuckle]

Iván Sánchez Ortega wrote:

tl****@gmail.co m wrote:

>Solved! I upped the max memory in php.ini from 8M to 16M.

That doesn't solve it - it just postpones it.

Open the file, fseek() to the end, read 4Kb chunks, then strrchr() to find
the line breaks. No wasted memory.

Maybe, maybe not. It depends on how large the file gets.

Reading 4K at a time and trying to tack things together across chunks is
also requires a much larger amount of CPU.

I often give PHP 32-128MB, depending on the system and what's required
for the site. Memory is cheaper than CPU cycles.

--
=============== ===
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
js*******@attgl obal.net
=============== ===