demo_php_regular_expression

test_parse_php_error_file.php

<?php 
//======================================================================
// Author: Thitipong Samranvanich 
// Since : 2017-05-25 
// UseFor: Parse PHP CodeIgniter log , Display only Error Rows 
// Copyright 2016
//======================================================================
// create and test pattern online by  https://regex101.com/

$a_str = file("logslog-2017-03-09.php");
$str = join("\r\n",$a_str);
$a_match =  [] ; 
$pattern = '/(ERROR - 2017-.+ -->)(.+)/';
foreach($a_str as $idx => $str){
	
	preg_match($pattern,$str,$a_match);
	if( count($a_match ) > 0 ){
		
		echo "\r\n$idx ";
		//print_r($a_match);
		echo $a_match[2]; 
	}
}
//================================================

$a_str = file("logslog-2017-03-09.php");
$str = join("\r\n",$a_str);
$a_match =  [] ; 
$pattern = '/(ERROR - 2017-.+ --> \$config)(\[.+\])(.+)/';
$a_brief = [];
foreach($a_str as $idx => $str){
	
	preg_match($pattern,$str,$a_match);
	if( count($a_match ) > 0 ){
		
		echo "\r\n$idx ";
		//print_r($a_match);
		echo $a_match[3]; 
		if(!in_array($a_match[2],$a_brief)){ $a_brief[] = $a_match[2];}
	}
}
print_r($a_brief);