我需要能够跳过以 ### 开头的文件的前 20 行。 (实际上有 18 行以### 开头，两行以 ; 开头)。

我尝试过的所有方法都无法跳过相同的两行——我不知道为什么。

这是我尝试过的(这只是我代码的相关部分):

elseif($sourceformat == "Babylon") {

    $line = fgets($source_file);
    if($line[0] === '#') {
        continue;
    }
    if(strpos(trim($line), '#') === 0) {
        continue;
    }
    if(substr($line, 0, 1) == "#") {
        continue;
    }

    $source = trim(fgets($source_file));

    if(empty($source)) {
        continue;
    }

    $target = trim(fgets($source_file));
}
// then I proceed to writing the extracted terms into a new file that has a different format.

我已经单独和一起尝试了上述三种方法($line[0] === '#' 和 strpos(trim($line), '#') 和 substr($line, 0, 1) == '#') – 但同一行总是被跳过(未检测到)。这是整个标题部分的样子(这是 Babylon 词汇表文件的标题(.gls – 但纯文本)。

### Glossary title:Cheeseus Muzik
### Author:Cheeseus
### Description:English - Bulgarian and Bulgarian - English glossary of musical terms
### Source language:Bulgarian
### Source alphabet:Cyrillic
### Target language:Bulgarian
### Target alphabet:Cyrillic
### Icon:
### Browsing enabled?Yes
### Type of glossary:00000000
### Case sensitive words?0
; DO NOT EDIT THE NEXT **SIX** LINES  - Babylon-Builder generated text !!!!!!
### Glossary id:0265922f91878d6e846e9c869d8a89447c6e719e8585886b8692955f91887a9b8474859a85616a279a929ca07f6881507056895d6881304b5142515f42ba6c992e2b23828188719469656840908429504d595b486965418931312d5b47ad7843525650833a233a47514270695543449f31373b7179484e435a8c428827
### Confirmation string:8A148GOK
### File build number:0121DA07
### Build:80"0)2"0
### Glossary settings:00000000
### Gls type:00000001
; DO NOT EDIT THE PREVIOUS **SIX** LINES  - Babylon-Builder generated text !!!!!!

### Glossary section:

a piacere
а пиачере, по желание

a tempo
а темпо, завръщане към основното темпо след отклонение

ad libitum
ат либитум, свободно, по желание

adagio
адажио (бавно)

allargando
аларгандо, забавяне

allegretto
алегрето, весело, бързичко

allegro
алегро, бързо, весело

allentando
алентандо, със забавяне

... (this is the actual glossary – source term on one line, target term on the next, followed by an empty line, then again source term, target term, new line. I only want these lines, while discarding (omitting, removing) the glossary header lines above. The code I have successfully removes all lines starting with # but this one below (the glossary ID), and it also removes the two lines starting with a semi-colon.

这是我似乎无法摆脱的行:

### Glossary id:0265922f91878d6e846e9c869d8a89447c6e719e8585886b8692955f91887a9b8474859a85616a279a929ca07f6881507056895d6881304b5142515f42ba6c992e2b23828188719469656840908429504d595b486965418931312d5b47ad7843525650833a233a47514270695543449f31373b7179484e435a8c428827

我怀疑这是因为这一行很长(或者可能是因为前一行以分号开头？)。我试过指定最大值。 fgets 中读取的每一行的字节长度:

$line = fgets($source_file, 8192);

但这也不起作用。希望你能帮上忙。

整个代码太长，无法放在这里，但它已经可以正常工作了——除了去掉这一行。

解决方案(基于@Mehdi Bounya 的回答)

看来我没有在正确的地方执行我已经完成的检查。这是完全满足我需要的代码:

elseif($sourceformat == "Babylon") {

    if($targetformat == "Wordfast") {
        $converted_source_target_delimiter = "\t";
        $converted_term_delimiter = "\r\n";
    }

    $source = trim(fgets($source_file));

    if(empty($source)) {
        continue;
    }
    if($source[0] === '#') {
        continue;
    }
    if($source[0] === ';') {
        continue;
    }

    $target = trim(fgets($source_file));
}
$exported_entry = $source.$converted_source_target_delimiter.$target.$converted_term_delimiter;

感谢所有提供帮助的人!

最佳答案

您可以使用 fopen 打开文件并遍历各行，然后简单地检查该行是否以您想要的字符开头。

这个函数有两个参数，$file 是文件路径，$startWith 是要跳过的字符数组:

function skipLines($file, $startWith = NULL){
    $handle = fopen($file, "r");
    if ($handle) {
        while (($buffer = fgets($handle)) !== false) {
            if(in_array($buffer[0], $startWith)){
                // Your code if line starts with $startWith
            } else {
                // Your code if line does not start with $startWith
                echo $buffer;
            }
        }
        fclose($handle);
    }
}

skipLines("sample.txt", ['#']); // Result 1


skipLines("sample.txt", [';']); // Result 2


skipLines("sample.txt", ['#', ';']); // Result 3

结果 1:

; DO NOT EDIT THE NEXT **SIX** LINES  - Babylon-Builder generated text !!!!!!
; DO NOT EDIT THE PREVIOUS **SIX** LINES  - Babylon-Builder generated text !!!!!!

结果 2:

### Glossary title:Cheeseus Muzik
### Author:Cheeseus
### Description:English - Bulgarian and Bulgarian - English glossary of musical terms
### Source language:Bulgarian
### Source alphabet:Cyrillic
### Target language:Bulgarian
### Target alphabet:Cyrillic
### Icon:
### Browsing enabled?Yes
### Type of glossary:00000000
### Case sensitive words?0
### Glossary id:0265922f91878d6e846e9c869d8a89447c6e719e8585886b8692955f91887a9b8474859a85616a279a929ca07f6881507056895d6881304b5142515f42ba6c992e2b23828188719469656840908429504d595b486965418931312d5b47ad7843525650833a233a47514270695543449f31373b7179484e435a8c428827
### Confirmation string:8A148GOK
### File build number:0121DA07
### Build:80"0)2"0
### Glossary settings:00000000
### Gls type:00000001

### Glossary section:

结果 3:

// Nothing...

关于PHP:跳过/删除以###开头的行，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/49806265/