文本文件数据库处理函数库

因为我租不起MySQL支持， 所以只能采用扁平文件存储，
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我是采用perl常用的"|"定界的格式，就像 "name|email|homepage" 这样的格式。
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随便写了几个函数， 觉得还是有点用处的。 大家有什么心得，
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也希望能告诉我啊， 我来完善完善。
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<?php
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// dtf.inc.php3
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//
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// DTF -- Delimited Text File Functions
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// Written by: Goghs <[email protected]>
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// http://www.eqiao.com
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//
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// Function to manage a delimited text file database
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function dtf_fetch_all_as_string($filename) {
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$fp = fopen( $filename, "r" );
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$current = fread($fp, filesize($filename));
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fclose($fp);
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return $current;
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}
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function dtf_fetch_all_as_array($dbname) {
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return file($dbname);
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}
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function dtf_update_db($dbname, $item) {
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if (file_exists($dbname)):
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$fp = fopen($dbname,"w+");
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fputs($fp,$item);
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fclose($fp);
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else:
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$fp = fopen($dbname,"w");
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fputs($fp,$item);
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fclose($fp);
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endif;
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}
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function dtf_get_total_rows($dbname) {
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return count(file($dbname));
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}
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function dtf_remove_pipe($input) {
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if (is_string($input)) {
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// $input=ereg_replace("|","",$input); // It’s said that str-replace is faster than ereg_replace
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$input=str_replace("|","",$input);
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}
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if (is_array($input)) {
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for ($i=0; $i<count($input); $i++) {
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$input[$i] = ereg_replace("|","|",$input[$i]);
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}
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}
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return $input;
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}
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// 这个函数没有用， 用htmlspecialchars就可以
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// 但是如果只需要处理"<",">"而不需要处理 引号和 &时就很有用
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function dtf_remove_html_tag($input) {
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if (is_string($input)) {
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$input = ereg_replace("<","<",$input);
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$input = ereg_replace(">",">",$input);
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}
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if (is_array($input)) {
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for ($i=0; $i<count($input); $i++) {
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$input[$i] = ereg_replace("<","<",$input[$i]);
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$input[$i] = ereg_replace(">",">",$input[$i]);
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}
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}
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return $input;
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}
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// 可以定制这个函数， 控制是否允许html标记等
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function dtf_sanitize($input) {
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$input = dtf_remove_pipe($input);
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// $input = dtf_remove_html_tag($input);
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$input = stripslashes($input);
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$input = htmlspecialchars($input);
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return $input;
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}
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?>
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