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wp-content/plugins/pressable-cache-management/admin/custom-functions/wp-write-to-file-lib.php

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+<?php
+
+function pressable_cache_extend()
+{
+
+}
+
+// http://www.php.net/is_writable
+function is_writeable_wp_config($path)
+{
+
+    if ((defined('PHP_OS_FAMILY') && 'Windows' !== constant('PHP_OS_FAMILY')) || stristr(PHP_OS, 'DAR') || !stristr(PHP_OS, 'WIN'))
+    {
+        return is_writeable($path);
+    }
+
+    // PHP's is_writable does not work with Win32 NTFS
+    if ($path[strlen($path) - 1] == '/')
+    { // recursively return a temporary file path
+        return is_writeable_wp_config($path . uniqid(mt_rand()) . '.tmp');
+    }
+    elseif (is_dir($path))
+    {
+        return is_writeable_wp_config($path . '/' . uniqid(mt_rand()) . '.tmp');
+    }
+
+    // check tmp file for read/write capabilities
+    $rm = file_exists($path);
+    $f = @fopen($path, 'a');
+    if ($f === false) return false;
+    fclose($f);
+    if (!$rm)
+    {
+        unlink($path);
+    }
+
+    return true;
+}
+
+// function wp_cache_setting( $field, $value ) {
+// 	global $wp_cache_config_file;
+// 	$GLOBALS[ $field ] = $value;
+// 	if ( is_numeric( $value ) ) {
+// 		return wp_config_file_replace_line( '^ *\$' . $field, "\$$field = $value;", $wp_cache_config_file );
+// 	} elseif ( is_bool( $value ) ) {
+// 		$output_value = $value === true ? 'true' : 'false';
+// 		return wp_config_file_replace_line( '^ *\$' . $field, "\$$field = $output_value;", $wp_cache_config_file );
+// 	} elseif ( is_object( $value ) || is_array( $value ) ) {
+// 		$text = var_export( $value, true );
+// 		$text = preg_replace( '/[\s]+/', ' ', $text );
+// 		return wp_config_file_replace_line( '^ *\$' . $field, "\$$field = $text;", $wp_cache_config_file );
+// 	} else {
+// 		return wp_config_file_replace_line( '^ *\$' . $field, "\$$field = '$value';", $wp_cache_config_file );
+// 	}
+// }
+function wp_config_file_replace_line($old, $new, $my_file)
+{
+    if (@is_file($my_file) == false)
+    {
+        if (function_exists('set_transient'))
+        {
+            set_transient('wpsc_config_error', 'config_file_missing', 10);
+        }
+        return false;
+    }
+    if (!is_writeable_wp_config($my_file))
+    {
+        if (function_exists('set_transient'))
+        {
+            set_transient('wpsc_config_error', 'config_file_ro', 10);
+        }
+        trigger_error("Error: file $my_file is not writable.");
+        return false;
+    }
+
+    $found = false;
+    $loaded = false;
+    $c = 0;
+    $lines = array();
+    while (!$loaded)
+    {
+        $lines = file($my_file);
+        if (!empty($lines) && is_array($lines))
+        {
+            $loaded = true;
+        }
+        else
+        {
+            $c++;
+            if ($c > 100)
+            {
+                if (function_exists('set_transient'))
+                {
+                    set_transient('wpsc_config_error', 'config_file_not_loaded', 10);
+                }
+                trigger_error("wp_config_file_replace_line: Error  - file $my_file could not be loaded.");
+                return false;
+            }
+        }
+    }
+    foreach ((array)$lines as $line)
+    {
+        if (trim($new) != '' && trim($new) == trim($line))
+        {
+            pressable_cache_extend("wp_config_file_replace_line: setting not changed - $new");
+            return true;
+        }
+        elseif (preg_match("/$old/", $line))
+        {
+            pressable_cache_extend("wp_config_file_replace_line: changing line " . trim($line) . " to *$new*");
+            $found = true;
+        }
+    }
+
+    global $cache_path;
+    $tmp_config_filename = tempnam($GLOBALS['cache_path'], 'wpsc');
+    rename($tmp_config_filename, $tmp_config_filename . ".php");
+    $tmp_config_filename .= ".php";
+    pressable_cache_extend('wp_config_file_replace_line: writing to ' . $tmp_config_filename);
+    $fd = fopen($tmp_config_filename, 'w');
+    if (!$fd)
+    {
+        if (function_exists('set_transient'))
+        {
+            set_transient('wpsc_config_error', 'config_file_ro', 10);
+        }
+        trigger_error("wp_config_file_replace_line: Error  - could not write to $my_file");
+        return false;
+    }
+    if ($found)
+    {
+        foreach ((array)$lines as $line)
+        {
+            if (!preg_match("/$old/", $line))
+            {
+                fputs($fd, $line);
+            }
+            elseif ($new != '')
+            {
+                fputs($fd, "$new\n");
+            }
+        }
+    }
+    else
+    {
+        $done = false;
+        foreach ((array)$lines as $line)
+        {
+            // if ( $done || ! preg_match( '/\brequire_once\b/i', $line ) ) {
+            if ($done || !preg_match('/\b(require_once)\b/', $line))
+            {
+                fputs($fd, $line);
+            }
+            else
+            {
+                //add fputs($fd, "$new\n"); here to write function above require_once
+                
+                fputs($fd, $line);
+                //Write function at the button of require_once
+                fputs($fd, "$new\n");
+                $done = true;
+
+            }
+        }
+    }
+    fclose($fd);
+    rename($tmp_config_filename, $my_file);
+    pressable_cache_extend('wp_config_file_replace_line: moved ' . $tmp_config_filename . ' to ' . $my_file);
+
+    // if (function_exists("opcache_invalidate"))
+    // {
+    //     @opcache_invalidate($my_file);
+    // }
+    
+    if (function_exists("wp_opcache_invalidate"))
+        {
+            wp_opcache_invalidate($my_file);
+        }
+
+    return true;
+}