php中,用preg_match_all()正则检测600k左右长度字符串的合法性
600K左右的字符串,是数字+分隔符。因为是用户提交的,所以要检测是否合法。我这里用preg_match_all+正则来检测,字符串短的时候,是可以检测的,没有问题,当字符串超过100k的时候,nginx就会502
我也查到了问题所在,pcre中设定了回溯值
后来,我根据网上给出的解决方法
1 |
|
依然是502
正则代码是:
1 |
|
字符串格式是:
1 |
|
请问有别的方法可以解决这个问题吗?
或者是我哪里的设置不对?
回复内容:
600K左右的字符串,是数字+分隔符。因为是用户提交的,所以要检测是否合法。我这里用preg_match_all+正则来检测,字符串短的时候,是可以检测的,没有问题,当字符串超过100k的时候,nginx就会502
我也查到了问题所在,pcre中设定了回溯值
后来,我根据网上给出的解决方法
1 |
|
依然是502
正则代码是:
1 |
|
字符串格式是:
1 |
|
请问有别的方法可以解决这个问题吗?
或者是我哪里的设置不对?
即使设置了pcre.backtrack_limit
还是有可能崩溃的,因为巨大的回溯可能会爆栈,这是系统级别的限制,PHP
也左右不了。建议你选用其他方法来处理这些内容,比如先分割,在循环检查每个小段。

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