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49 lines
1.5 KiB
PHP
49 lines
1.5 KiB
PHP
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<?php
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/**
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* Is the URL on the current WordPress web site?
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*
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* Checks if URL begins with Site Home URL.
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* Strip http[s]://[www.] and leading and trailing blanks and convert to lower-case before comparing,
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* to allow http, etc. to be omitted on entry
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*
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* @param string $url URL to be checked to be sure it is "on" the current WordPress web site
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* @return bool bool TRUE if URL is on current WordPress web site; FALSE otherwise
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*/
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function jr_ps_site_url( $url ) {
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$site_home = jr_ps_urlcompare_prep( get_home_url() );
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return ( substr( jr_ps_urlcompare_prep( $url ), 0, strlen( $site_home ) ) === $site_home );
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}
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/**
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* Prepare a URL for comparison with another URL
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*
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* Strip [http[s]://][www.] and leading and trailing blanks, and convert to lower-case,
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* to:
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* (1) permit comparison of "synonym" URLs; and
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* (2) allow http to be omitted when inputting a URL
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*
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* @param string $url URL to be prepped for comparison
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* @return string URL prepped for comparison
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*/
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function jr_ps_urlcompare_prep( $url ) {
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$prep_url = strtolower( trim( $url ) );
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if ( 'http' === substr( $prep_url, 0, 4 ) ) {
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if ( 's' === substr( $prep_url, 4, 1 ) ) {
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$cursor = 5; // Next character to look at in URL
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} else {
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$cursor = 4;
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}
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if ( '://' === substr( $prep_url, $cursor, 3 ) ) {
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$cursor = $cursor + 3;
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}
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} else {
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$cursor = 0;
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}
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if ( 'www.' === substr( $prep_url, $cursor, 4 ) ) {
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$cursor = $cursor + 4;
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}
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return substr( $prep_url, $cursor );
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}
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?>
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