php实现读取和写入tab分割的文件_PHP教程

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//

// save an array as tab seperated text file

//

function write_tabbed_file($filepath, $array, $save_keys=false){

$content = '';

reset($array);

while(list($key, $val) = each($array)){

// replace tabs in keys and values to [space]

$key = str_replace("\t", " ", $key);

$val = str_replace("\t", " ", $val);

if ($save_keys){ $content .= $key."\t"; }

// create line:

$content .= (is_array($val)) ? implode("\t", $val) : $val;

$content .= "\n";

}

if (file_exists($filepath) && !is_writeable($filepath)){

return false;

}

if ($fp = fopen($filepath, 'w+')){

fwrite($fp, $content);

fclose($fp);

}

else { return false; }

return true;

}

//

// load a tab seperated text file as array

//

function load_tabbed_file($filepath, $load_keys=false){

$array = array();

if (!file_exists($filepath)){ return $array; }

$content = file($filepath);

for ($x=0; $x < count($content); $x++){

if (trim($content[$x]) != ''){

$line = explode("\t", trim($content[$x]));

if ($load_keys){

$key = array_shift($line);

$array[$key] = $line;

}

else { $array[] = $line; }

}

}

return $array;

}

/*

** Example usage:

*/

$array = array(

'line1' => array('data-1-1', 'data-1-2', 'data-1-3'),

'line2' => array('data-2-1', 'data-2-2', 'data-2-3'),

'line3' => array('data-3-1', 'data-3-2', 'data-3-3'),

'line4' => 'foobar',

'line5' => 'hello world'

);

// save the array to the data.txt file:

write_tabbed_file('data.txt', $array, true);

/* the data.txt content looks like this:

line1 data-1-1 data-1-2 data-1-3

line2 data-2-1 data-2-2 data-2-3

line3 data-3-1 data-3-2 data-3-3

line4 foobar

line5 hello world

*/

// load the saved array:

$reloaded_array = load_tabbed_file('data.txt',true);

print_r($reloaded_array);

// returns the array from above