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  • Bug fixes for general core bugs in 4.0.x will end 8 May 2023 (12 months).
  • Bug fixes for security issues in 4.0.x will end 13 November 2023 (18 months).
  • PHP version: minimum PHP 7.3.0 Note: the minimum PHP version has increased since Moodle 3.10. PHP 7.4.x is also supported.
/lib/xhprof/xhprof_lib/utils/ -> callgraph_utils.php (source)

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Defines 8 functions

  xhprof_http_header()
  xhprof_generate_mime_header()
  xhprof_generate_image_by_dot()
  xhprof_get_children_table()
  xhprof_generate_dot_script()
  xhprof_render_diff_image()
  xhprof_get_content_by_run()
  xhprof_render_image()

Functions
Functions that are not part of a class:

xhprof_http_header($name, $value)   X-Ref
Send an HTTP header with the response. You MUST use this function instead
of header() so that we can debug header issues because they're virtually
impossible to debug otherwise. If you try to commit header(), SVN will
reject your commit.

param: string  HTTP header name, like 'Location'
param: string  HTTP header value, like 'http://www.example.com/'

xhprof_generate_mime_header($type, $length)   X-Ref
Genearte and send MIME header for the output image to client browser.

author: cjiang

xhprof_generate_image_by_dot($dot_script, $type)   X-Ref
Generate image according to DOT script. This function will spawn a process
with "dot" command and pipe the "dot_script" to it and pipe out the
generated image content.

author: cjiang
returns: , binary content of the generated image on success. empty string on
param: dot_script, string, the script for DOT to generate the image.
param: type, one of the supported image types, see

xhprof_get_children_table($raw_data)   X-Ref
No description

xhprof_generate_dot_script($raw_data, $threshold, $source, $page,$func, $critical_path, $right=null,$left=null)   X-Ref
Generate DOT script from the given raw phprof data.

author: cjiang
returns: , string, the DOT script to generate image.
param: raw_data, phprof profile data.
param: threshold, float, the threshold value [0,1). The functions in the
param: page, string(optional), the root node name. This can be used to
param: func, string, the focus function.
param: critical_path, bool, whether or not to display critical path with

xhprof_render_diff_image($xhprof_runs_impl, $run1, $run2,$type, $threshold, $source)   X-Ref
No description

xhprof_get_content_by_run($xhprof_runs_impl, $run_id, $type,$threshold, $func, $source,$critical_path)   X-Ref
Generate image content from phprof run id.

author: cjiang
returns: , string, the DOT script to generate image.
param: object  $xhprof_runs_impl  An object that implements
param: run_id, integer, the unique id for the phprof run, this is the
param: type, string, one of the supported image types. See also
param: threshold, float, the threshold value [0,1). The functions in the
param: func, string, the focus function.

xhprof_render_image($xhprof_runs_impl, $run_id, $type, $threshold,$func, $source, $critical_path)   X-Ref
Generate image from phprof run id and send it to client.

author: cjiang
param: object  $xhprof_runs_impl  An object that implements
param: run_id, integer, the unique id for the phprof run, this is the
param: type, string, one of the supported image types. See also
param: threshold, float, the threshold value [0,1). The functions in the
param: func, string, the focus function.
param: bool, does this run correspond to a PHProfLive run or a dev run?