php - 无法在 php 中使用 preg_match 通过特殊符号分割字符串

Question

我想使用 preg_match 函数按某些特定符号分割字符串，但不起作用。

这是我尝试过的代码，但我无法解决问题。

所以问题出在输出数组中，您可以看到 1 ,4 和 6 索引没有通过 != 、 !{} 和 !() 符号正确分割字符串，并且其余符号正确拆分。请帮助我。

I am spliting string by using following symbols


          = 
         != 
         >= 
         <= 
         > 
         < 
         {}
        !{} 
         () 
         !()



<?php

echo "<pre>";


$action_array = array(
        'sku{}NP-POCH-B15-C12,NP-FGV-C15',
        'brand!=nutra,avc',
        'category_ids=1,4,5',
        'quote_item_qty>=5',
        'quote_item_row_total!{}140',
        'attribute_set_id<=4',
        'attribute_set_list!()4,5,7',
        'quote_grand_total()100',
        'grand_total>100',
        'grand_total<100',
    );

$action_format = array();

echo "<ul>\n";

echo "<pre>";
print_r($action_array);
foreach($action_array as $key => $statement) {
    $reg_ex = '/([a-zA-Z_!]*)([()>=<={}=!()><!=!{}]*)([a-zA-Z0-9-,]*)/';
    $matches = array();
    $rslt = preg_match($reg_ex, $statement, $matches);
    $action_format[] = array(
        'type' => 'salesrule/rule_condition_product',
        'attribute' => $matches[1],
        'operator' => $matches[2],
        'value' => $matches[3]
        );
    //echo "<li>(".$rslt.") [".$statement."] ".print_r($matches,true)."</li>\n";
}
echo "</ul>\n";
echo "<p>\$action_format: <pre>".print_r($action_format,true)."</pre></p>\n";
?>  

输出:

Array
(
    [0] => sku{}NP-POCH-B15-C12,NP-FGV-C15
    [1] => brand!=nutra,avc
    [2] => category_ids=1,4,5
    [3] => quote_item_qty>=5
    [4] => quote_item_row_total!{}140
    [5] => attribute_set_id<=4
    [6] => attribute_set_list!()4,5,7
    [7] => quote_grand_total()100
    [8] => grand_total>100
    [9] => grand_total<100
)

$action_format: 

Array
(
    [0] => Array
        (
            [type] => salesrule/rule_condition_product
            [attribute] => sku
            [operator] => {}
            [value] => NP-POCH-B15-C12,NP-FGV-C15
        )

    [1] => Array
        (
            [type] => salesrule/rule_condition_product
            [attribute] => brand!
            [operator] => =
            [value] => nutra,avc
        )

    [2] => Array
        (
            [type] => salesrule/rule_condition_product
            [attribute] => category_ids
            [operator] => =
            [value] => 1,4,5
        )

    [3] => Array
        (
            [type] => salesrule/rule_condition_product
            [attribute] => quote_item_qty
            [operator] => >=
            [value] => 5
        )

    [4] => Array
        (
            [type] => salesrule/rule_condition_product
            [attribute] => quote_item_row_total!
            [operator] => {}
            [value] => 140
        )

    [5] => Array
        (
            [type] => salesrule/rule_condition_product
            [attribute] => attribute_set_id
            [operator] => <=
            [value] => 4
        )

    [6] => Array
        (
            [type] => salesrule/rule_condition_product
            [attribute] => attribute_set_list!
            [operator] => ()
            [value] => 4,5,7
        )

    [7] => Array
        (
            [type] => salesrule/rule_condition_product
            [attribute] => quote_grand_total
            [operator] => ()
            [value] => 100
        )

    [8] => Array
        (
            [type] => salesrule/rule_condition_product
            [attribute] => grand_total
            [operator] => >
            [value] => 100
        )

    [9] => Array
        (
            [type] => salesrule/rule_condition_product
            [attribute] => grand_total
            [operator] => <
            [value] => 100
        )

)

Answer 1

这只是一个拼写错误(我认为)，您已经包含了该角色!在第一个字符类中。删除它。

另外不要忘记，字符类只是一组没有顺序的字符，而不是一组字符串。换句话说，您不必编写类似 [()>=<={}=!()><!=!{}] 的内容。 , [><}{)(=!]就足够了。

如果您不必检查操作的格式是否正确，您也可以使用格式化字符串而不是正则表达式以函数方式执行相同的操作:

$format = '%[^{}()=<>!]%[{}()=<>!]%s';
$proto = ['type' => 'salesrule/rule_condition_product'];
$keys = ['attribute', 'operator', 'value'];
$action_format = [];

foreach ($action_array as $action) {
    $action_format[] = $proto + array_combine($keys, sscanf($action, $format));
}

demo

(如果您想要更实用，请不要使用 foreach 并使用 array_map )