如何在Linux下查看PHP错误日志？ (linux 查看php错误日志)
PHP是一种广泛使用的开源服务器端脚本语言，用于Web开发和编程。在Web应用程序开发过程中，PHP错误日志是一个非常重要的文件，用于记录各种PHP错误和异常的详细信息。在Linux系统中，查看和分析PHP错误日志可以帮助开发人员识别和修复应用程序中的错误和问题，提高应用程序的性能和稳定性。本文将介绍如何在Linux系统下查看PHP错误日志的方法。
方法一：查看Apache访问日志
Apache访问日志是记录服务器请求和响应的文件，其中包含PHP运行时的错误信息。可以使用以下命令查看Apache访问日志：
$tl -f /var/log/httpd/access_log
该命令将以实时模式跟踪并输出Apache访问日志，您可以在文件中搜索PHP的错误信息。
方法二：查看Apache以及PHP错误日志
Apache错误日志和PHP错误日志是记录Apache和PHP运行时错误和异常的文件。可以使用以下命令查看Apache和PHP错误日志：
$tl -f /var/log/httpd/error_log
$tl -f /var/log/httpd/php_error_log
这些命令将以实时模式跟踪并输出Apache和PHP错误日志，您可以在文件中搜索任何PHP的警告、错误或致命错误。
方法三：使用PHP ini文件查看错误日志
PHP.ini文件是用于配置PHP的默认参数和运行时配置的文件，其中也包含PHP错误日志的配置。可以使用以下命令查看PHP.ini文件的位置：
$php –ini
然后打开该文件，并搜索以下行：
error_log = /var/log/php_error_log
打开对应的PHP错误日志，并查找错误或异常信息。
方法四：使用命令行查看PHP错误日志
Linux系统提供了一些内置的命令，可以用来查找和过滤日志文件中的信息。可以使用以下命令查找PHP错误日志中的信息：
$grep “PHP Fatal error” /var/log/php_error_log
该命令将搜索文件，并输出所有PHP致命错误的信息。
PHP错误日志是开发人员识别和修复Web应用程序错误和问题的重要工具。在Linux系统中，您可以使用以上方法查看PHP错误日志，提高Web应用程序的性能和稳定性。
相关问题拓展阅读：
求问php configure err 错误怎么办
php-configure错误解决
configure: error: libjpeg.(a|so) not found
configure: error: libjpeg.(a|so) not found
ln -sf libjpeg.so.62.0.0 libjpeg.so
configure: error: libpng.(a|so) not found.
yum install libpng-devel
32位和64位的都装了。你可以强制删除两个包，再重装64位的包。
rpm –allmatches –nodeps
可能在config结束后会提示:
configure: error: libjpeg.(a|so) not found
configure: error: libjpng.(a|so) not found
错误，那么请在configure前执行如下的命令:
cp -frp /usr/lib64/libjpeg.* /usr/lib/
cp -frp /usr/lib64/libpng* /usr/lib/
因为php默认就在/usr/lib/下找相关库文件,而x64机器上是在:/usr/lib64
解决这个拿岩问题，首先确定你安装的 jpeg的x86_64的的安装位置
shell> updatedb
shell> locate libjpeg.so
看或则到已经安装位置
然后明白php参数的含义
根据php的配置参数
–with-jpeg-dir=/usr –with-libdir=lib64
–with-jpeg-dir=/usr ：是确定jpeg的安装位置
–with-libdir=lib64 ： 这个是一个全局参数，代表配置器寻找所有安装路径下的lib64目录，而不是默认安装路径下的lib目消团御录
CentOS 5 常见的configure error的解决方法:23仅限于CentOS 5
configure: error: No curses/termcap library found
网上有的说法是：
–with-named-curses-libs=/usr/lib/libncursesw.so.5
其实是不对的，虽然能解决configure的错误，但是make的时候会提示错误，正确的做法应该是
yum -y install ncurses-devel
debian: apt-get install libncurses5-dev
configure: error: xml2-config not found
yum -y install libxml2-devel
debian:apt-get install libxml2-dev
configure: error: Cannot find OpenSSL’s
yum -y install openssl-devel
configure: error: libjpeg.(a|so) not found
yum -y install gd
yum -y install gd-devel
debian:apt-get install libjpeg-dev
configure: error: libpng.(a|so) not found.
apt-get install libpng12-dev
configure: error: cannot find output from lex; giving up
yum -y install flex
configure: error: mod_deflate has been requested but can not be built due to prerequisite failures
yum -y install zlib-devel openssl-devel
debian:apt-get install zlib1g-dev
configure: error: libXpm.(a|so) not found.
apt-get install libxpm-dev
onfigure: error: freetype.h not found.
apt-get install libfreetype6-dev
configure: error: …No recognized SSL/TLS toolkit detected
apt-get install libssl-dev
在x64的机器上编译PHP+GD的时候需要注意一下
Written by bixuan on 2023年04月12号 – 11:04
php编译常见错误大全Posted in linux相关 | 七月 22nd, 2023
1) Configure: error: xml2-config not found. Please check your libxml2 installation.
Solutions :
yum install libxml2 libxml2-devel (For Redhat & Fedora)
# aptitude install libxml2-dev (For ubuntu)
2) Checking for pkg-config… /usr/bin/pkg-config
configure: error: Cannot find OpenSSL’s
Solutions :
yum install openssl openssl-devel
3) Configure: error: Please reinstall the BZip2 distribution
Solutions :
yum install bzip2 bzip2-devel
4) Configure: error: Please reinstall the libcurl distribution –
easy.h should be in /include/curl/
Solutions :
yum install curl curl-devel (For Redhat & Fedora)
# install libcurl4-gnutls-dev (For Ubuntu)
5) Configure: error: libjpeg.(also) not found.
Solutions :
yum -y install gd
yum -y install gd-devel
yum install libjpeg libjpeg-devel
6) Configure: error: libpng.(also) not found.
Solutions :
yum install libpng libpng-devel
apt-get install libpng12-dev
7) Configure: error: freetype.h not found.
Solutions :
yum install freetype-devel
Configure: error: Unable to locate gmp.h
Solutions :
yum install gmp-devel
9) Configure: error: Cannot find MySQL header files under /usr.
Note that the MySQL client library is not bundled anymore!
Solutions :
yum install mysql-devel (For Redhat & Fedora)
# apt-get install libmysql++-dev (For Ubuntu)
10) Configure: error: Please reinstall the ncurses distribution
Solutions :
yum install ncurses ncurses-devel
11) Checking for unixODBC support… configure: error: ODBC header file ‘/usr/include/sqlext.h’ not found!
Solutions :
yum install unixODBC-devel
12) Configure: error: Cannot find pspell
Solutions :
yum install pspell-devel
13) configure: error: mcrypt.h not found. Please reinstall libmcrypt.
Solutions :
yum install libmcrypt libmcrypt-devel (For Redhat & Fedora)
# apt-get install libmcrypt-dev
14) Configure: error: snmp.h not found. Check your SNMP installation.
Solutions :
yum install net-snmp net-snmp-devel
15)开启LDAP服务还需要
yum -y install openldap-devel openldap-servers openldap-clients
16)configure: error: No curses/termcap library found
网上有的说法是：
–with-named-curses-libs=/usr/lib/libncursesw.so.5
其实是不对的，虽然能解决configure的错误，但是make的时候会提示错误，正确的做法应该是
yum -y install ncurses-devel (for redhat)
apt-get install libncurses5-dev(for debian)
17)configure: error: cannot find output from lex; giving up
yum -y install flex
18)configure: error: mod_deflate has been requested but can not be built due to prerequisite failures
yum -y install zlib-devel openssl-devel
debian:apt-get install zlib1g-dev
19)configure: error: libXpm.(a|so) not found.
apt-get install libxpm-dev
补充：通过以上命令配置PHP时，遇到错误，总说找不到libmcrypt。由于这服务器是个裸机，很多必须的库都没装，必须一个一个的手动安装，可libmcrypt这个库我的确装过了。重试n遍，无解，解决方案
Then I visited
an learned that I have to install not only libmcrypt
but also mcrypt and libmhash.
Here is the to do:
libmcrytp:
———–
download libmcrypt-.tar.gz
create the following directory: / usr / local / libmcrypt
copy the libmcrypt-.tar.gz into that directory and move to it
run the following shell (>) commands: (’’ is the version number)
> gunzip -c libmcrypt-.tar.gz | tar xf –
> cd libmcrypt-
> ./configure –disable-posix-threads
> make
> make check (note: ‘make check’ is optional)
> make install
then (update your environment) add in / etc / profile the following path:
/usr/local/libmcrypt/libmcrypt-x
(note: as I run Red Hat 7.3 I set the line a f t e r the if-part
(id -u = 0 …) with: pathmunge /usr/local / libm….)
and add in / etc / ld.so.conf the following path: /usr/local/lib
then run ldconfig:
> ldconfig
now comes the important part:
> cd /usr/local/libmcrypt/libmcrypt-/libltdl
> ./configure –enable-ltdl-install
> make
> make install
(maybe not needed: I also added a link in / usr / bin: )
(> cd /usr/bin)
(> ln -s /usr/lib/libltdl.so.3.1.0 ltdl)
mhash:
———–
download mhash-.tar.gz
create the following directory: / usr / local / mhash
copy the mhash-.tar.gz into that directory and move to it
run the following shell (>) commands: (’’ is the version number)
> gunzip -c mhash-.tar.gz | tar xf –
> cd mhash-
> ./configure
> make
> make check (note: ‘make check’ is optional)
> make install
mcrypt:
———–
download mcrypt-.tar.gz
create the following directory: / usr / local / mcrypt
copy the mcrypt-.tar.gz into that directory and move to it
run the following shell (>) commands: (’’ is the version number)
> gunzip -c mcrypt-.tar.gz | tar xf –
> cd mhash-
> ./configure
> make
> make check (note: ‘make check’ is optional)
> make install
back to PHP:
————–
move into your PHP installation directory
then the following command worked on my computer:
>
./configure –with-apache=/usr/local/apache/apache_1.3.29 –with-mysql –wit
h-mcrypt=/usr/local/mcrypt/mcrypt-2.6.4
> make
> make install
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