The call to the preg_replace() function replaces the dollar sign, any whitespace, and every comma with the empty string, yielding what's supposed to be an integer.

调用 preg_replace() 函数将用空字符串替换美元符号、所有空格和每个逗号，生成认为是整数的内容。

youdao

So far, in public at least, Mr Milosevic shows little sign of yielding to America's ultimatum.

ECONOMIST: Will Slobodan Milosevic fall?

In another sign by Democrats that they weren't yielding, Reid introduced separate legislation Tuesday aimed at denying most funding for the war after March.

CNN: No yielding on war funding as Bush proposes talks