API Reference Guide > Zend Code Tracing - Configuration Directives

Zend Code Tracing - Configuration Directives

This topic lists all the configuration directives for Zend Code Tracing.

Configuration Directives Summary

The table below is a summary of all the Zend Code Tracing configuration directives, and displays the directive name, its default value, and a description:

Directive	Default Value	Description
zend_codetracing.enable	1	Is tracing functionality enabled?
zend_codetracing.buffer_size	1M	The size of the trace memory buffer.
zend_codetracing.dump_format	2	The type of dump produced.
zend_codetracing.max_string	48	The maximal length of string values to store in trace files. Longer strings will be truncated.
zend_codetracing.max_depth	2	The maximal depth of arrays to store in trace files. Deeper nesting levels will not be stored.
zend_codetracing.max_elements	10	The maximal number of array elements to store in trace files. Longer arrays will be truncated.
zend_codetracing.dump_file	codetracing/dump	The file path and name prefix for saving trace files, relative to zend.data_dir.
zend_codetracing.trace_enable	0	Enable Tracing data collection.
zend_codetracing.trace_time	1	Enable execution time measurment.
zend_codetracing.trace_source_lines	1	Enable source file collection.
zend_codetracing.trace_internal_functions	1	Enable internal functions collection.
zend_codetracing.trace_user_functions	1	Enable user functions call collection.
zend_codetracing.trace_includes	1	Enable tracing include and require calls.
zend_codetracing.trace_arguments	1	Enable function call argument collection.
zend_codetracing.trace_return_values	1	Enable function return value collection.
zend_codetracing.trace_exceptions	1	Enable PHP exception data collection.
zend_codetracing.trace_arrays	1	Enable array contents recording.
zend_codetracing.trace_write	1	Enable output data writing collection.
zend_codetracing.trace_headers	1	Enable HTTP response headers collection.
zend_codetracing.trace_memory_usage	1	Enable memory usage data collection.
zend_codetracing.trace_errors	1	Enable PHP error collection.
zend_codetracing.trace_events	1	Enable Zend Monitor event recording.
zend_codetracing.always_dump	0	Trace data is always persisted.
zend_codetracing.dump_on_segv	1	Save tracing data if a fatal signal (e.g. a segmentation fault) is raised.
zend_codetracing.max_freq	1	Amount of time in seconds to wait between consecutive Code Tracing data writes.
zend_codetracing.log_file	codetracing.log	Log file for the Code Tracing module (relative to the log dir).
zend_codetracing.log_verbosity	0	Logging verbosity level.
zend_codetracing.override_functions	@ZEND_PREFIX/etc/functions.txt	List of internal functions to Trace.
zend_codetracing.max_concurrent_trace_buffers	5	Number of concurrent trace buffer allocated.
zend_codetracing.log_rotation_size	10	The maximal size of the log file before it is rotated.
zend_codetracing.use_fast_timestamp	0	Use cycles-based time caclculation. Set to false only if you have a problem with frequency probe.
zend_codetracing.max_disk_space	5120	Maximum disk space for trace files.

Configuration Directives Details

The list below contains information for all the available configuration directives for Zend Code Tracing: their description, type, units, default value, modification scope, and the Zend Server version they became available in.

zend_codetracing.enable

Is tracing functionality enabled?

Default Value: 1

Type: boolean

Modification Scope: ZEND_INI_PERDIR

Available Since Version: 4.0

zend_codetracing.buffer_size

The size of the trace memory buffer.

Default Value: 1M

Units: Bytes

Type: string

Modification Scope: ZEND_INI_SYSTEM

Available Since Version: 4.0

zend_codetracing.dump_format

The type of dump produced.

Default Value: 2

Type: int

Modification Scope: ZEND_INI_ALL

Available Since Version: 4.0

zend_codetracing.max_string

The maximal length of string values to store in trace files. Longer strings will be truncated.

Default Value: 48

Units: Bytes

Type: int

Modification Scope: ZEND_INI_ALL

Available Since Version: 4.0

zend_codetracing.max_depth

The maximal depth of arrays to store in trace files. Deeper nesting levels will not be stored.

Default Value: 2

Type: int

Modification Scope: ZEND_INI_ALL

Available Since Version: 4.0

zend_codetracing.max_elements

The maximal number of array elements to store in trace files. Longer arrays will be truncated.

Default Value: 10

Type: int

Modification Scope: ZEND_INI_ALL

Available Since Version: 4.0

zend_codetracing.dump_file

The file path and name prefix for saving trace files, relative to zend.data_dir.

Default Value: codetracing/dump

Type: string

Modification Scope: ZEND_INI_ALL

Available Since Version: 4.0

zend_codetracing.trace_enable

Enable Tracing data collection. If the Zend Monitor is loaded, the value of this directive is controlled by the Monitor extension (i.e. it will override any value set in the codetracing.ini file).

Default Value: 0

Type: boolean

Modification Scope: ZEND_INI_ALL

Available Since Version: 4.0

zend_codetracing.trace_time

Enable execution time measurment.

Default Value: 1

Type: boolean

Modification Scope: ZEND_INI_ALL

Available Since Version: 4.0

zend_codetracing.trace_source_lines

Enable source file collection.

Default Value: 1

Type: boolean

Modification Scope: ZEND_INI_ALL

Available Since Version: 4.0

zend_codetracing.trace_internal_functions

Enable internal functions collection.

Default Value: 1

Type: boolean

Modification Scope: ZEND_INI_ALL

Available Since Version: 4.0

zend_codetracing.trace_user_functions

Enable user functions call collection.

Default Value: 1

Type: boolean

Modification Scope: ZEND_INI_ALL

Available Since Version: 4.0

zend_codetracing.trace_includes

Enable tracing include and require calls.

Default Value: 1

Type: boolean

Modification Scope: ZEND_INI_ALL

Available Since Version: 4.0

zend_codetracing.trace_arguments

Enable function call argument collection.

Default Value: 1

Type: boolean

Modification Scope: ZEND_INI_ALL

Available Since Version: 4.0

zend_codetracing.trace_return_values

Enable function return value collection.

Default Value: 1

Type: boolean

Modification Scope: ZEND_INI_ALL

Available Since Version: 4.0

zend_codetracing.trace_exceptions

Enable PHP exception data collection.

Default Value: 1

Type: boolean

Modification Scope: ZEND_INI_ALL

Available Since Version: 4.0

zend_codetracing.trace_arrays

Enable array contents recording.

Default Value: 1

Type: boolean

Modification Scope: ZEND_INI_ALL

Available Since Version: 4.0

zend_codetracing.trace_write

Enable output data writing collection.

Default Value: 1

Type: boolean

Modification Scope: ZEND_INI_ALL

Available Since Version: 4.0

zend_codetracing.trace_headers

Enable HTTP response headers collection.

Default Value: 1

Type: boolean

Modification Scope: ZEND_INI_ALL

Available Since Version: 4.0

zend_codetracing.trace_memory_usage

Enable memory usage data collection.

Default Value: 1

Type: boolean

Modification Scope: ZEND_INI_ALL

Available Since Version: 4.0

zend_codetracing.trace_errors

Enable PHP error collection.

Default Value: 1

Type: boolean

Modification Scope: ZEND_INI_ALL

Available Since Version: 4.0

zend_codetracing.trace_events

Enable Zend Monitor event recording.

Default Value: 1

Type: boolean

Modification Scope: ZEND_INI_ALL

Available Since Version: 4.0

zend_codetracing.always_dump

Trace data is always persisted.

Default Value: 0

Type: boolean

Modification Scope: ZEND_INI_ALL

Available Since Version: 4.0

zend_codetracing.dump_on_segv

Save tracing data if a fatal signal (e.g. a segmentation fault) is raised.

Default Value: 1

Type: boolean

Modification Scope: ZEND_INI_ALL

Available Since Version: 4.0

zend_codetracing.max_freq

Amount of time in seconds to wait between consecutive Code Tracing data writes.

Default Value: 1

Units: MBytes

Type: int

Modification Scope: ZEND_INI_SYSTEM

Available Since Version: 4.0

zend_codetracing.log_file

Log file for the Code Tracing module (relative to the log dir).

Default Value: codetracing.log

Type: string

Modification Scope: ZEND_INI_SYSTEM

Available Since Version: 4.0

zend_codetracing.log_verbosity

Logging verbosity level.

Default Value: 0

Type: int

Modification Scope: ZEND_INI_SYSTEM

Available Since Version: 4.0

zend_codetracing.override_functions

List of overriding functions. Can contain function names, wildcards (prefix_*) and references to files (@filename). Entries are separated by comma. File contains one entry per line, which can be function name or wildcard.

Default Value: @ZEND_PREFIX/etc/functions.txt

Type: string

Modification Scope: ZEND_INI_SYSTEM

Available Since Version: 4.0

zend_codetracing.max_concurrent_trace_buffers

Number of concurrent trace buffer allocated.

Default Value: 5

Type: int

Modification Scope: ZEND_INI_ALL

Available Since Version: 4.0

zend_codetracing.log_rotation_size

The maximal size of the log file before it is rotated.

Default Value: 10

Units: MBytes

Type: int

Modification Scope: ZEND_INI_ALL

Available Since Version: 4.0

zend_codetracing.use_fast_timestamp

Use cycles-based time caclculation. Set to false only if you have a problem with frequency probe.

Default Value: 0

Type: boolean

Modification Scope: ZEND_INI_SYSTEM

Available Since Version: 4.0

zend_codetracing.max_disk_space

Maximum disk space for trace files. For unlimited, set 0.

Default Value: 5120

Units: MBytes

Type: int

Modification Scope: ZEND_INI_SYSTEM

Available Since Version: 6.1

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