1 | <?php
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2 | /*
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3 | * Project: NodeMap2.0
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4 | * File: LogHandler.class.php
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5 | * Purpose: Handling our log file containing log entries generated by the application
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6 | */
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7 |
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8 | /*
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9 | * Log levels:
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10 | * SYSLOG_EMERG System is unusable
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11 | * SYSLOG_ALERT Action must be taken immediately
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12 | * SYSLOG_CRIT Critical conditions
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13 | * SYSLOG_ERR Error conditions
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14 | * SYSLOG_WARNING Warning conditions
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15 | * SYSLOG_NOTICE Normal, but significant, condition
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16 | * SYSLOG_INFO Informational message
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17 | * SYSLOG_DEBUG Debug-level message
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18 | */
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19 |
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20 | define('SYSLOG_NONE', 0);
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21 | define('SYSLOG_EMERG', 1);
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22 | define('SYSLOG_ALERT', 2);
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23 | define('SYSLOG_CRIT', 3);
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24 | define('SYSLOG_ERR', 4);
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25 | define('SYSLOG_WARNING', 5);
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26 | define('SYSLOG_NOTICE', 6);
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27 | define('SYSLOG_INFO', 7);
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28 | define('SYSLOG_DEBUG', 8);
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29 |
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30 | /*
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31 | * Actions on log levels
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32 | */
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33 | define('LOG_LEVEL_ECHO', SYSLOG_DEBUG);
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34 | define('LOG_LEVEL_WRITE', SYSLOG_DEBUG);
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35 | define('LOG_LEVEL_MAIL', SYSLOG_DEBUG);
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36 |
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37 | class LogHandler {
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38 | /*
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39 | * Function: __construct (constructor)
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40 | * Parameters: -
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41 | * Function: Creating a LogHandler object
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42 | */
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43 | public function __construct() {
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44 | }
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45 |
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46 | /*
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47 | * Function: logEntry
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48 | * Parameters: int $logno, string $logstr, string $logfile, int $logline
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49 | * Function: Handling with log entries, decides what to do with it
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50 | */
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51 | public function logEntry($logno, $logstr, $logfile, $logline) {
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52 | $errorString = 'SysLog ';
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53 |
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54 | switch ($logno) {
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55 | case SYSLOG_EMERG:
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56 | $errorString = 'Emergency';
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57 | break;
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58 | case SYSLOG_ALERT:
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59 | $errorString = 'Alert';
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60 | break;
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61 | case SYSLOG_CRIT:
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62 | $errorString = 'Critical';
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63 | break;
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64 | case SYSLOG_ERR:
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65 | $errorString = 'Error';
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66 | break;
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67 | case SYSLOG_WARNING:
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68 | $errorString = 'Warning';
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69 | break;
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70 | case SYSLOG_NOTICE:
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71 | $errorString = 'Notice';
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72 | break;
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73 | case SYSLOG_INFO:
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74 | $errorString = 'Information';
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75 | break;
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76 | case SYSLOG_DEBUG:
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77 | $errorString = 'Debug';
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78 | break;
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79 | default:
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80 | $errorString = 'SYSLOG_DEFAULT';
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81 | break;
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82 | }
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83 |
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84 | $time = date( "H:i.s m/d/y" );
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85 | $errorString .= ' (' . $logno .' | '.$time .' | ): ' . $logstr . "\r\n\t" . 'In file "' . $logfile . '" on line "' . $logline . '"' . "\r\n";
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86 |
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87 | if ($logno <= LOG_LEVEL_ECHO) {
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88 | echo '<!-- ' . $errorString . ' -->';
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89 | }
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90 | if ($logno <= LOG_LEVEL_WRITE) {
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91 | $filename = 'logfile.txt';
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92 | if (is_writable($filename)) {
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93 |
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94 | //Check if the file can be opened
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95 | if (!$handle = fopen($filename, 'w')) {
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96 | define('LOG_LEVEL_WRITE', LOG_LEVEL_NONE);
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97 | trigger_log(SYSLOG_EMERG, 'Cannot open file "' . $filename . '"', __FILE__, __LINE__);
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98 | exit;
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99 | }
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100 |
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101 | // Write $errorString to file.
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102 | if (fwrite($handle, $errorString) === FALSE) {
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103 | define('LOG_LEVEL_WRITE', LOG_LEVEL_NONE);
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104 | trigger_log(SYSLOG_EMERG, 'Cannot write to "' . $filename . '"', __FILE__, __LINE__);
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105 | exit;
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106 | }
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107 |
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108 | fclose($handle);
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109 |
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110 | } else {
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111 | define('LOG_LEVEL_WRITE', LOG_LEVEL_NONE);
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112 | trigger_log(SYSLOG_EMERG, 'Cannot write to "' . $filename . '"', __FILE__, __LINE__);
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113 | }
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114 | }
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115 |
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116 | if ($logno <= LOG_LEVEL_MAIL) {
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117 | mail('test@test.com', 'Nodemap error', $errorString);
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118 | }
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119 | }
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120 | }
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121 |
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122 | $LOG_HANDLER = new LogHandler();
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123 |
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124 | /*
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125 | * Function: trigger_log
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126 | * Parameters: int $logno, string $logstr, string $logfile, int $logline
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127 | * Function: Handling with log entries, forwarding them to our $LOG_HANDLER object.
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128 | */
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129 | function trigger_log($logno, $logstr, $logfile, $logline) {
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130 | global $LOG_HANDLER;
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131 |
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132 | $LOG_HANDLER->logEntry($logno, $logstr, $logfile, $logline);
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133 | }
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134 | ?>
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