Count the number of times the WordPress shortcode is used in a post
I have the following WordPress shortcode function:
function wp_shortcode() {
static $i=1;
$return = '['.$i.']';
$i++;
return $return;
}
add_shortcode('shortcode', 'wp_shortcode');
This works great. The variable $i
is incremented every time the function is called in the article. So for
[shortcode][shortcode][shortcode][shortcode]
the output will be as expected
[1][2][3][4]
but
if the article contains more than one page than the counter is reset on the next page of the article. So for:
[shortcode][shortcode][shortcode][shortcode]
<!--nextpage-->
[shortcode][shortcode][shortcode][shortcode]
output
[1][2][3][4]
<!--nextpage-->
[1][2][3][4]
instead of the desired output:
[1][2][3][4]
<!--nextpage-->
[5][6][7][8]
Is there anyway to change this?
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So, after exploring a slightly more complex idea with preprocessing the_content and adding $ atts to shorcodes before showing the shortcodes, I came up with the following:
function my_shortcode_content( $content ) {
//check to see if the post has your shortcode, skip do nothing if not found
if( has_shortcode( $content, 'shortcode' ) ):
//replace any shortcodes to the basic form ([shortcode 1] back to [shortcode])
//usefull when the post is edited and more shortcodes are added
$content = preg_replace('/shortcode .]/', 'shortcode]', $content);
//loop the content and replace the basic shortcodes with the incremented value
$content = preg_replace_callback('/shortocode]/', 'rep_count', $content);
endif;
return $content;
}
add_filter( 'content_save_pre' , 'my_shortcode_content' , 10, 1);
function rep_count($matches) {
static $i = 1;
return 'shortcode ' . $i++ .']';
}
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Good question. A possible solution is below, however not entirely elegant, because it requires you to have a fixed number of shortcodes per page, for example. 4:
add_shortcode( 'shortcode', 'wp_shortcode' );
function wp_shortcode() {
global $page;
$spp = 4;
static $i = 1;
$ii = $i + ( ( $page - 1 ) * $spp );
$return = '<a href="#f'.$ii.'" name="r'.$ii.'">['.$ii.']</a>';
$i++;
return $return;
}
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This is because on every page load, you redefined your function, so it static $i=1;
will always be executed.
You might want to use a variable $_SESSION
. But don't forget session_start()
somewhere in the callback init
.
function wp_shortcode() {
if (empty($_SESSION["myCounter"])) {
$_SESSION["myCounter"] = 1;
}
$return = '<a href="#f' . $_SESSION["myCounter"] . '" name="r'
. $_SESSION["myCounter"] . '">['
. $_SESSION["myCounter"] . ']</a>';
$_SESSION["myCounter"]++;
return $return;
}
add_shortcode('shortcode', 'wp_shortcode');
When ending the session, place it in functions.php
add_action('init', 'my_init');
function my_init() {
if (!session_id()) {
session_start();
}
//Other init here
}
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If you just need to count the common tags on a page / page you can use this:
function count_shortcodes( $content, $tag ) {
if ( false === strpos( $content, '[' ) ) {
return 0;
}
if ( shortcode_exists( $tag ) ) {
preg_match_all( '/' . get_shortcode_regex() . '/', $content, $matches, PREG_SET_ORDER );
if ( empty( $matches ) )
return 0;
$count = 0;
foreach ( $matches as $shortcode ) {
if ( $tag === $shortcode[2] ) {
$count++;
} elseif ( ! empty( $shortcode[5] ) && has_shortcode( $shortcode[5], $tag ) ) {
$count++;
}
}
return $count;
}
return 0;
}
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