我目前想使用带有 PHP 的 monaco 编辑器，并且我想通过自动完成来扩展它，用于常规 PHP 函数以及自定义函数。
虽然函数的自动完成功能在我早期的原型上运行良好，但自动完成参数不起作用。参见小提琴的例子： https ://jsfiddle.net/95aq6497/2/
目前，只有函数 substr 被提供为自动完成并且正在工作。但是，由 registerSignatureHelpProvider 定义的参数的帮助器不起作用：
monaco.languages.registerSignatureHelpProvider('php', {
provideSignatureHelp: (model, position, token) => {
console.log('Signature Help');
return {
activeParameter: 0,
activeSignature: 0,
signatures: [{
label: 'string substr(string $string, int $start [, int $length])',
parameters: [
{
label: 'string $string',
documentation: 'The input string. Must be one character or longer.'
},
{
label: 'int $start',
documentation: "If $start is non-negative, the returned string will start at the $start'th position in string, counting from zero. For instance, in the string 'abcdef', the character at position 0 is 'a', the character at position 2 is 'c', and so forth.\r\nIf $start is negative, the returned string will start at the $start'th character from the end of string. If $string is less than $start characters long, FALSE will be returned."
},
{
label: 'int $length',
documentation: 'If $length is given and is positive, the string returned will contain at most $length characters beginning from $start (depending on the length of $string) If $length is given and is negative, then that many characters will be omitted from the end of $string (after the start position has been calculated when a start is negative). If $start denotes the position of this truncation or beyond, FALSE will be returned. If $length is given and is 0, FALSE or NULL, an empty string will be returned. If $length is omitted, the substring starting from $start until the end of the string will be returned.'
}
]
}]
};
}
});
该功能甚至没有执行，因为 console.log 根本没有触发。我错过了什么？通过一个函数类似地扩展 javascript 像这样工作得很好，但它不适用于 PHP，那么这里有什么不同呢？