Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <pre><code>function ReadFromEndByLine($filename,$lines) { /* freely customisable number of lines read per time*/ $bufferlength = 5000; $handle = @fopen($filename, "r"); if (!$handle) { echo "Error: can't find or open $filename&lt;br/&gt;\n"; return -1; } /*get the file size with a trick*/ fseek($handle, 0, SEEK_END); $filesize = ftell($handle); /*don't want to get past the start-of-file*/ $position= - min($bufferlength,$filesize); while ($lines &gt; 0) { if ($err=fseek($handle,$position,SEEK_END)) { /* should not happen but it's better if we check it*/ echo "Error $err: something went wrong&lt;br/&gt;\n"; fclose($handle); return $lines; } /* big read*/ $buffer = fread($handle,$bufferlength); /* small split*/ $tmp = explode("\n",$buffer); /*previous read could have stored a partial line in $aliq*/ if ($aliq != "") { /*concatenate current last line with the piece left from the previous read*/ $tmp[count($tmp)-1].=$aliq; } /*drop first line because it may not be complete*/ $aliq = array_shift($tmp); $read = count($tmp); if ( $read &gt;= $lines ) { /*have read too much!*/ $tmp2 = array_slice($tmp,$read-$n); /* merge it with the array which will be returned by the function*/ $lines = array_merge($tmp2,$lines); /* break the cycle*/ $lines = 0; } elseif (-$position &gt;= $filesize) { /* haven't read enough but arrived at the start of file*/ //get back $aliq which contains the very first line of the file $lines = array_merge($aliq,$tmp,$lines); //force it to stop reading $lines = 0; } else { /*continue reading...*/ //add the freshly grabbed lines on top of the others $lines = array_merge($tmp,$lines); $lines -= $read; //next time we want to read another block $position -= $bufferlength; //don't want to get past the start of file $position = max($position, -$filesize); } } fclose($handle); return $lines; } </code></pre> <p>This will be fast for larger files but alot of code for a simple task, if there LARGE FILES, use this</p> <p>ReadFromEndByLine('myFile.txt',6);</p>
    singulars
    1. This table or related slice is empty.
    1. POHow to read only 5 last line of the text file in PHP?
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USRobertPitt
    1. USRobertPitt
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COThis requires reading the entire file into memory, which may be very bad.
      singulars
      1. PO
      1. USdkamins
    2. COUpdated with a larger block of code but yet faster and less memory usage. - Taken from http://mydebian.blogdns.org/?p=197
      singulars
      1. PO
      1. USRobertPitt
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload