rrd_graph

    (PECL rrd >= 0.9.0)

    rrd_graph — Creates image from a data

    Description

    rrd_graph(string $filename, array $options): array

    Creates image for a particular data from RRD file.

    Parameters

    filename

    The filename to output the graph to. This will generally end in either .png, .svg or .eps, depending on the format you want to output.

    options

    Options for generating image. See man page of rrd graph for all possible options. All options (data definitions, variable definitions, etc.) are allowed.

    Return Values

    Array with information about generated image is returned, or false on failure.

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    User Contributed Notes 6 notes

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    2
    Anonymous
    4 years ago
    This documentation page is useless ...

    "See man page of rrd graph for all possible options"

    I thought I am looking at the documentation, of not, why not provide a link ?
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    0
    info at ukee dot nl
    9 years ago
    When using style features like: --font TITLE:13:Times
    use in your code: --font=TITLE:13:Times

    the "=" is missing in the documentation
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    Anonymous
    11 years ago
    When I add

    --font AXIS:8:

    into $options,

    I receive the next error:

    PNG creation error: unknown option '--font AXIS:8:'

    According to docs from rrdtool site the right syntax is:

    [-n|--font FONTTAG:size:[font]]

    This lets you customize which font to use for the various text elements on the RRD graphs. DEFAULT sets the default value for all elements, TITLE for the title, AXIS for the axis labels, UNIT for the vertical unit label, LEGEND for the graph legend, WATERMARK for the watermark on the edge of the graph.

    Use Times for the title: --font TITLE:13:Times

    Note that you need to quote the argument to --font if the font-name contains whitespace: --font "TITLE:13:Some Font"

    If you do not give a font string you can modify just the size of the default font: --font TITLE:13:.
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    0
    Dk
    11 years ago
    You can get the latest RRD Error by simply doing print_r(rrd_error()) immediately after the rrd_graph() call.
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    0
    Matt C
    12 years ago
    Note; apache server requires write access to the folder in which the image is to be created otherwise no image file is produced, and (unhelpfully) no error is generated.
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