从PHP中的字符串中删除单词

Question

我试图从给定的输入字符串中分离出单词中的某些特定单词。但是从分裂的单词阵列中，特定的单词不会被替换。

$string = $this->input->post('keyword'); 
echo $string; //what i want is you 

$string = explode(" ", $string); 

$string = array_values(array_filter(preg_replace('/[^A-Za-z0-9\']/','', $string))); 

$omit_words = array(' the ',' i ',' we ',' you ',' what ',' is '); 

$keyword = array_values(array_filter(str_ireplace($omit_words,'',$string))); 
print_r($keyword); // Array ([0] => what [1] => i [2] => want [3] => is [4] => you) 

预期输出：

Array ([0] => want) 

我无法找出什么是错在这。请帮我解决这个问题。

Answer 1

首先从数组$omit_words中的字符串中删除空格。尝试使用array_diff：如果要重新索引输出，可以使用array_values。

$string='what i want is you'; //what i want is you 

$string = explode(" ", $string); 

$omit_words = array('the','i','we','you','what','is'); 
$result=array_diff($string,$omit_words); 

print_r($result); // 

Answer 2

你可以使用array_diff然后array_values复位数组索引。

<?php 
$string = $this->input->post('keyword'); 
$string = explode(" ", $string); 

$omit_words = array('the','i','we','you','what','is'); 
$result = array_values(array_diff($string,$omit_words)); 

print_r($result); //Array ([0] => want) 
?> 

Answer 3

试试这个

<?php 
$string="what i want is you"; 
$omit_words = array('the','we','you','what','is','i'); // remove the spaces 
rsort($omit_words); // need to sort so that correct words are replaced 
$new_string=str_replace($omit_words,'',$string); 

print_r($new_string); 

Answer 4

你将不得不从omit_words删除空格：

$string = "what i want is you"; 

$string = explode(" ", $string); 

$string = array_values(array_filter(preg_replace('/[^A-Za-z0-9\']/','', $string))); 

$omit_words = array('the','is','we','you','what','i'); 

$keyword = array_values(array_filter(str_ireplace($omit_words, '', $string))); 
print_r($keyword); // Array ([0] => want)