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<?php |
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namespace NirjharLo\Cgss\Lib\Analysis\Lib; |
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if ( ! defined( 'ABSPATH' ) ) exit; |
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/** |
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* An object to extract most used pharases in an array of phrases, containing one or more words. |
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* But, for now we are using one word elements only. |
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* |
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* 2 properties. |
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* @property string $words Input words array |
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* @property string $text Input words array |
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*/ |
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class Keywords { |
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public $words; |
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public $text; |
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//generate individual words from text content |
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public function output() { |
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$one = $this->output_one(); |
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$two = $this->fetch(2); |
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$three = $this->fetch(3); |
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$four = $this->fetch(4); |
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$five = $this->fetch(5); |
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$six = $this->fetch(6); |
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$keys = array_merge( $six, $five, $four, $three, $two, $one ); |
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return $keys; |
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} |
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//generate individual words from text content |
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public function output_one() { |
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$one_arr = $this->fetch(1); |
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$stop = $this->stop(); |
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$output = array(); |
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foreach ( $one_arr as $val => $key ) { |
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if ( strlen( $val ) > 3 and ! in_array( $val, $stop ) ) { |
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$output[$val] = $key; |
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} |
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} |
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return array_slice( $output, 0, 10 ); |
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} |
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//generate individual words from text content |
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public function fetch( $n ) { |
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//compare text and words to find keyword |
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$keys = array(); |
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$phrs = $this->prepare( $n ); |
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$phrs_count = count($phrs); |
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foreach( $phrs as $val ) { |
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$key_num = substr_count( $this->text, $val ); |
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$key_per = round( ( ( ( $key_num * $n ) / $phrs_count ) * 100 ), 3 ); |
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if ( $key_num > 1 and $key_per > 0.2 and ! isset( $keys[$val] ) ) { |
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$keys[$val] = $key_per; |
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} |
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} |
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//arrange them to select top final 3 keyword |
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if ( is_array( $keys ) ) { |
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arsort( $keys ); |
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if ( $n != 1 ) { |
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//remove keys without much significance |
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$del_keys = array(); |
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foreach ( $keys as $val => $key ) { |
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$key_size = strlen( implode( '', explode( ' ', $val ) ) ) / 2; |
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if ( $key_size <= $n ) { |
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$del_keys[] = $val; |
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} |
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} |
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$new_keys = array_diff( $keys, $del_keys ); |
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$key_top = array_slice( $new_keys, 0, 3 ); |
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} else { |
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$key_top = $keys; |
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} |
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} |
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return $key_top; |
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} |
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//generate individual words from text content |
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public function prepare( $n ) { |
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$i = 0; |
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$part = array(); |
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$w_input = $this->words; |
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for( $i = 0; $i < $n; $i++ ) { |
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//create an array of words of pharses as sub-arrays |
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$pieces = array_chunk( $w_input, $n ); |
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$last_one = array_pop( $pieces ); |
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if ( is_array( $last_one ) and count( $last_one ) != $i ) { |
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unset($pieces[count($pieces) - 1]); |
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} |
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//create phrase out of those sub array |
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foreach( $pieces as $val ) { |
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$part[] = implode( ' ', $val ); |
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} |
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//Offset input words first value to create more unique words |
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$del_w_input = array_diff( $w_input, array( $w_input[0] ) ); |
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$w_input = array_values($del_w_input); |
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} |
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return $part; |
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} |
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//array of stop words |
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public function stop() { |
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return array( 'from', 'that', 'this', 'what', 'when', 'where', 'have', 'they', 'just', 'your', 'most', 'their', 'some', 'then', 'there', 'them', 'make', 'ever', 'never', 'enough', 'should', 'would', 'could', 'also', 'such', 'shall', 'will', 'with' ); |
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} |
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} |
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?> |
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nirjharlo /
complete-google-seo-scan
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