Question

我有一个log.php，我想substr一个file_get_contents("application\logs\log.php");函数，

日志文件包含：

ERROR - 2018-09-17 06:51:03 --> Severity: Warning --> Illegal string offset 'Catatan' /var/www/html/minilos/application/views/minilos/form_akkk.php 483
ERROR - 2018-09-17 06:51:03 --> Severity: Warning --> Illegal string offset 'Catatan' /var/www/html/minilos/application/views/minilos/form_akkk.php 483
ERROR - 2018-09-17 06:51:03 --> Severity: Warning --> Illegal string offset 'Rekomendasi' /var/www/html/minilos/application/views/minilos/form_akkk.php 502
ERROR - 2018-09-17 06:51:03 --> Severity: Warning --> Illegal string offset 'Rekomendasi' /var/www/html/minilos/application/views/minilos/form_akkk.php 502
ERROR - 2018-09-17 06:51:03 --> Severity: Warning --> Illegal string offset 'name' /var/www/html/minilos/application/views/minilos/form_akkk.php 507
ERROR - 2018-09-17 06:51:03 --> Severity: Warning --> Illegal string offset 'name' /var/www/html/minilos/application/views/minilos/form_akkk.php 507

如何摆脱'ERROR -'字符串并将第一个箭头'->'删除

2018-09-17 06:51:03 Severity: Warning --> Illegal string offset 'Catatan' /var/www/html/minilos/application/views/minilos/form_akkk.php 483

Answer 1

您可以使用preg_replace来提供最大的灵活性：

$err = "ERROR - 2018-09-17 06:51:03 --> Severity: Warning --> Illegal string offset 'Catatan' /var/www/html/minilos/application/views/minilos/form_akkk.php 483
ERROR - 2018-09-17 06:51:03 --> Severity: Warning --> Illegal string offset 'Catatan' /var/www/html/minilos/application/views/minilos/form_akkk.php 483
ERROR - 2018-09-17 06:51:03 --> Severity: Warning --> Illegal string offset 'Rekomendasi' /var/www/html/minilos/application/views/minilos/form_akkk.php 502
ERROR - 2018-09-17 06:51:03 --> Severity: Warning --> Illegal string offset 'Rekomendasi' /var/www/html/minilos/application/views/minilos/form_akkk.php 502
ERROR - 2018-09-17 06:51:03 --> Severity: Warning --> Illegal string offset 'name' /var/www/html/minilos/application/views/minilos/form_akkk.php 507
ERROR - 2018-09-17 06:51:03 --> Severity: Warning --> Illegal string offset 'name' /var/www/html/minilos/application/views/minilos/form_akkk.php 507";
echo preg_replace(array('/(^|\R)ERROR\s*-\s*/', '/(^|\R)(.*?)\s*-->\s*/'), array('$1', '$1$2 '), $err);

输出：

2018-09-17 06:51:03 Severity: Warning --> Illegal string offset 'Catatan' /var/www/html/minilos/application/views/minilos/form_akkk.php 483
2018-09-17 06:51:03 Severity: Warning --> Illegal string offset 'Catatan' /var/www/html/minilos/application/views/minilos/form_akkk.php 483
2018-09-17 06:51:03 Severity: Warning --> Illegal string offset 'Rekomendasi' /var/www/html/minilos/application/views/minilos/form_akkk.php 502
2018-09-17 06:51:03 Severity: Warning --> Illegal string offset 'Rekomendasi' /var/www/html/minilos/application/views/minilos/form_akkk.php 502
2018-09-17 06:51:03 Severity: Warning --> Illegal string offset 'name' /var/www/html/minilos/application/views/minilos/form_akkk.php 507
2018-09-17 06:51:03 Severity: Warning --> Illegal string offset 'name' /var/www/html/minilos/application/views/minilos/form_akkk.php 507

preg_replace调用具有两个匹配的模式：'/(^|\R)ERROR\s*-\s*/' and '/(^|\R)(.*?)\s*-->\s*/'和'$1' and '$1$2 '是相应的替换字符串。在这些字符串中，表达式$1引用模式中的第一个匹配组（在两种情况下，即(^|\R)都匹配行的开头或新行）。在第二个替换中，$2用于输出从行首到第一个-->的所有字符，即第二组(.*?)捕获的那些字符。

如何摆脱'ERROR-'字符串并删除第一个箭头'->'？

1 个答案: