PHP Cookbook Solutions _amp; Examples for PHP Programmers by David Sklar,Adam Trachtenberg

By David Sklar,Adam Trachtenberg

Are looking to comprehend a definite Hypertext Preprocessor programming approach? Or the right way to accomplish a selected activity? This cookbook is the 1st position to seem. With greater than 350 code-rich recipes revised for personal home page 5.4 and 5.5, this 3rd variation offers up to date strategies for producing dynamic net content—everything from utilizing easy facts kinds to querying databases, and from calling RESTful APIs to trying out and securing your web site.

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'; } $total += $sales_line[3]; } $total_line = array('All Regions','--','--',$total); // Print format-appropriate footer if ($format == 'csv') { fputcsv($output,$total_line); 32 | Chapter 1: Strings fclose($output) or die("Can't close php://output"); } else { echo '

' . implode(' ', $total_line) . '

'; echo '

'; } Accessing the program in Example 1-39 with format=csv in the query string causes it to return CSV-formatted output. Any other format value in the query string causes it to return HTML output.

For space-padded fields in fixed-width records, pack() provides a concise solution. 13 Generating Fixed-Width Field Data Records | 21 short. -padded fields. Example 1-32. '); print "$title$author$year\n"; } See Also Documentation on pack() and on str_pad(). 17 discusses pack() format strings in more detail. 14 Parsing Fixed-Width Field Data Records Problem You need to break apart fixed-width records in strings. Solution Use substr() as shown in Example 1-33. Example 1-33. txt','r',true) or die ("can't open file"); while ($s = fgets($fp,1024)) { $fields[1] = substr($s,0,25); // first field: first 25 characters of the line $fields[2] = substr($s,25,15); // second field: next 15 characters of the line $fields[3] = substr($s,40,4); // third field: next 4 characters of the line $fields = array_map('rtrim', $fields); // strip the trailing whitespace // a function to do something with the fields process_fields($fields); } fclose($fp) or die("can't close file"); Or unpack(), as shown in Example 1-34.

18 | Chapter 1: Strings Example 1-27. csv'; $fh = fopen($filename,'w') or die("Can't open $filename"); foreach ($sales as $sales_line) { if (fputcsv($fh, $sales_line) === false) { die("Can't write CSV line"); } } fclose($fh) or die("Can't close $filename"); Discussion To print the CSV-formatted data instead of writing it to a file, use the special output stream php://output, as shown in Example 1-28. Example 1-28. 34) ); $fh = fopen('php://output','w'); foreach ($sales as $sales_line) { if (fputcsv($fh, $sales_line) === false) { die("Can't write CSV line"); } } fclose($fh); To put the CSV-formatted data into a string instead of printing it or writing it to a file, combine the technique in Example 1-28 with output buffering, as shown in Example 1-29.

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