(PHP 3 >= 3.0.4, PHP 4, PHP 5)
get_meta_tags -- Extracts all meta tag content attributes from a file and returns an array
Description
array
get_meta_tags ( string filename [, bool use_include_path] )
Opens filename and parses it line by line
for <meta> tags in the file. This can be a local file or
an URL. The parsing stops at
</head>.
Setting use_include_path to TRUE will result
in PHP trying to open the file along the standard include path
as per the include_path
directive. This is used for local files, not URLs.
Example 1. What get_meta_tags() parses <meta name="author" content="name">
<meta name="keywords" content="php documentation">
<meta name="DESCRIPTION" content="a php manual">
<meta name="geo.position" content="49.33;-86.59">
</head> <!-- parsing stops here --> |
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(pay attention to line endings - PHP uses a native function to
parse the input, so a Mac file won't work on Unix).
The value of the name property becomes the key, the value of the
content property becomes the value of the returned array, so you
can easily use standard array functions to traverse it or access
single values. Special characters in the value of the name
property are substituted with '_', the rest is converted to lower
case. If two meta tags have the same name, only the last one
is returned.
Example 2. What get_meta_tags() returns
<?php
// Assuming the above tags are at www.example.com
$tags = get_meta_tags('http://www.example.com/');
// Notice how the keys are all lowercase now, and
// how . was replaced by _ in the key.
echo $tags['author']; // name
echo $tags['keywords']; // php documentation
echo $tags['description']; // a php manual
echo $tags['geo_position']; // 49.33;-86.59
?>
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Note:
As of PHP 4.0.5, get_meta_tags() supports
unquoted HTML attributes.
See also htmlentities() and
urlencode().
