PHP-將字符串拆分為數組

Question

我有一個看起來像這樣的php字符串...

[line1]this is some test text[/line1][line2]This is line 2 text[/line2][line3]This is line 3 text[/line3]

我正在嘗試采用這種方法，並創建一個看起來像這樣的數組。

array(
    "line1"=>"this is some test text",
    "line2"=>"This is line 2 text",
    "line3"=>"This is line 3 text"
)

該字符串是動態創建的，因此可以包含第1行-第99行，依此類推。

做到這一點並使其可擴展的最佳方法是什么？ 有人能給我指出一個例子嗎？

Answer 1

就正則表達式而言，這可能是對匹配模式的合理折衷。

注意： 這不會處理嵌套/遞歸。

\\[([^\\]]+)\\](.*?)\\[/\\g{1}\\]

用法：

preg_match_all( '%\[([^\]]+)\](.*?)\[/\g{1}\]%', $subject, $matches, PREG_SET_ORDER );
var_dump( $matches );

---

Match the character “[” literally «\[»
Match the regex below and capture its match into backreference number 1 «([^\]]+)»
   Match any character that is NOT a “]” «[^\]]+»
      Between one and unlimited times, as many times as possible, giving back as needed (greedy) «+»
Match the character “]” literally «\]»
Match the regex below and capture its match into backreference number 2 «(.*)»
   Match any single character that is NOT a line break character (line feed) «.*»
      Between zero and unlimited times, as many times as possible, giving back as needed (lazy) «*»
Match the character “[” literally «\[»
Match the character “/” literally «/»
Match the same text that was most recently matched by capturing group number 1 (case sensitive; fail if the group did not participate in the match so far) «\g{1}»
Match the character “]” literally «\]»

Answer 2

您可以使用explode采取這種方法（通過多次拆分輸入字符串）來隔離相關數據： line-id和line-text ：

$text = "[line1]this is some test text[/line1][line2]This is line 2 text[/line2][line3]This is line 3 text[/line3]";

$text = explode( '][line', ']'.$text.'[line');

// you'll get a spurious item at index 0 and at the end, they'll be skipped

$n = count( $text );

$output = array();

for( $i = 1; $i < $n - 1; $i++ )
{
    $line = explode( ']', $text[ $i] );
    $id = 'line' . $line[ 0 ];
    $line = explode( '[', $line[ 1 ] );
    $value = $line[ 0 ];
    $output[ $id ] = $value;
}

var_export( $output );
echo "\n";

你得到：

array (
  'line1' => 'this is some test text',
  'line2' => 'This is line 2 text',
  'line3' => 'This is line 3 text',
)

注意：

可以容忍並正確處理空的“行”

line文本中的方形制動器會破壞代碼並擰緊所有內容。

輸入格式必須嚴格按照以下格式

[line n [line ] 文本 [/line n [/line ] ....

如果您還有其他要求，可以調整代碼。

我認為這可能是一個很好的起點。

注意（再次）：

這是一個可行的解決方案（鑒於上述限制）。

另一種方法是使用正則表達式和preg_match_all()使用捕獲組來檢索行ID和行文本。