function try_control_string($link, $control_string, $trace_file, $offset)
{
if (true !== ($tmp = mysqli_debug($control_string))) {
printf("[%03d][control string '%s'] Expecting boolean/true, got %s/%s.\n", $offset + 1, $control_string, gettype($tmp), $tmp);
return false;
}
if (!($res = mysqli_query($link, 'SELECT * FROM test'))) {
printf("[%03d][control string '%s'] [%d] %s.\n", $offset + 2, $control_string, mysqli_errno($link), mysqli_error($link));
return false;
}
clearstatcache();
if (!file_exists($trace_file)) {
printf("[%03d][control string '%s'] Trace file has not been written.\n", $offset + 3, $control_string, gettype($tmp), $tmp);
return false;
}
unlink($trace_file);
}
function try_control_string($link, $control_string, $trace_file, $offset)
{
@unlink($trace_file);
if (true !== ($tmp = @mysqli_debug($control_string))) {
printf("[%03d][control string '%s'] Expecting boolean/true, got %s/%s.\n", $offset + 1, $control_string, gettype($tmp), $tmp);
return false;
}
if (!($res = mysqli_query($link, 'SELECT * FROM test'))) {
printf("[%03d][control string '%s'] [%d] %s.\n", $offset + 2, $control_string, mysqli_errno($link), mysqli_error($link));
return false;
}
while ($row = mysqli_fetch_assoc($res)) {
}
mysqli_free_result($res);
clearstatcache();
if (!file_exists($trace_file)) {
printf("[%03d][control string '%s'] Trace file has not been written.\n", $offset + 3, $control_string, gettype($tmp), $tmp);
return false;
}
return trim(substr(file_get_contents($trace_file), 0, 100024));
}
<?php
require_once 'connect.inc';
// NOTE: documentation is not clear on this: function always return NULL or TRUE
if (true !== ($tmp = mysqli_debug(sprintf('d:t:O,%s/mysqli_debug_phpt.trace', sys_get_temp_dir())))) {
printf("[002] Expecting boolean/true, got %s/%s\n", gettype($tmp), $tmp);
}
if ($IS_MYSQLND) {
// let's make this mysqlnd only - for libmysql we need debug installation
// table.inc will create a database connection and run some SQL queries, therefore
// the debug file should have entries
$test_table_name = 'test_mysqli_debug_table_1';
require_once 'table.inc';
clearstatcache();
$trace_file = sprintf('%s/mysqli_debug_phpt.trace', sys_get_temp_dir());
if (!file_exists($trace_file)) {
printf("[003] Trace file '%s' has not been created\n", $trace_file);
}
if (filesize($trace_file) < 50) {
printf("[004] Trace file '%s' is very small. filesize() reports only %d bytes. Please check.\n", $trace_file, filesize($trace_file));
}
// will mysqli_debug() mind if the trace file gets removed?
unlink($trace_file);
clearstatcache();
if (!($res = mysqli_query($link, 'SELECT * FROM test'))) {
printf("[005] [%d] %s\n", mysqli_errno($link), mysqli_error($link));
} else {
mysqli_free_result($res);
}
mysqli_close($link);
clearstatcache();
printf("[005] Cannot write to trace file.\n");
}
fclose($fp);
if (true !== ($tmp = mysqli_debug(sprintf('d:a,%s', $trace_file)))) {
printf("[006] Expecting boolean/true, got %s/%s\n", gettype($tmp), $tmp);
}
if (!($res = mysqli_query($link, 'SELECT * FROM test'))) {
printf("[007] [%d] %s\n", mysqli_errno($link), mysqli_error($link));
} else {
mysqli_free_result($res);
}
$trace = file_get_contents($trace_file);
if (!strstr($trace, 'mysqli_debug.phpt test line')) {
printf("[008] Cannot find original file content any more. Seems that the trace file got overwritten and not appended. Please check.");
}
if (true !== ($tmp = mysqli_debug(sprintf('d:A,%s', $trace_file)))) {
printf("[009] Expecting boolean/true, got %s/%s\n", gettype($tmp), $tmp);
}
if (!($res = mysqli_query($link, 'SELECT * FROM test'))) {
printf("[010] [%d] %s\n", mysqli_errno($link), mysqli_error($link));
} else {
mysqli_free_result($res);
}
if (!strstr(file_get_contents($trace_file), $trace)) {
printf("[011] Cannot find original file content any more. Seems that the trace file got overwritten and not appended. Please check.");
}
}
// what will happen if we create new trace entries...?
unlink($trace_file);
clearstatcache();
if (file_exists($trace_file)) {