第一次编译安装PHP的时候很顺利,因为要增加freetype,所以要重新编译,结果死活就是无法通过configure。
centos7信息
uname -a
Linux dev 3.10.0-327.el7.x86_64 #1 SMP Thu Nov 19 22:10:57 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
运行 ./configure 报错
configure: error: cannot run C compiled programs.
If you meant to cross compile, use `--host'.
运行 grep error config.log
cc: error: unrecognized command line option '-V'
cc: fatal error: no input files
cc: error: unrecognized command line option '-qversion'
cc: fatal error: no input files
conftest.c:9:19: fatal error: stdio.h: No such file or directory
configure:4076: error: in `/usr/local/src/php-5.6.19':
configure:4078: error: cannot run C compiled programs.
按照网上说的方法 在configure后面加上了 --host=x86_64 ,报错
configure: error: in `/usr/local/src/php-5.6.19':
configure: error: C preprocessor "/lib/cpp" fails sanity check
config.log中错误提示,差好几个头文件
cc: error: unrecognized command line option '-V'
cc: fatal error: no input files
cc: error: unrecognized command line option '-qversion'
cc: fatal error: no input files
conftest.c:9:19: fatal error: stdio.h: No such file or directory
configure:4076: error: in `/usr/local/src/php-5.6.19':
configure:4078: error: cannot run C compiled programs.
[root@dev php-5.6.19]# grep error config.log
cc: error: unrecognized command line option '-V'
cc: fatal error: no input files
cc: error: unrecognized command line option '-qversion'
cc: fatal error: no input files
conftest.c:9:19: fatal error: stdio.h: No such file or directory
conftest.c:9:20: fatal error: stdarg.h: No such file or directory
| These don't provoke an error unfortunately, instead are silently treated
| as 'x'. The following induces an error, until -std is added to get
cc: error: unrecognized command line option '-qlanglvl=extc89'
| These don't provoke an error unfortunately, instead are silently treated
| as 'x'. The following induces an error, until -std is added to get
cc: error: unrecognized command line option '-qlanglvl=ansi'
| These don't provoke an error unfortunately, instead are silently treated
| as 'x'. The following induces an error, until -std is added to get
cc: error: unrecognized command line option '-std'
| These don't provoke an error unfortunately, instead are silently treated
| as 'x'. The following induces an error, until -std is added to get
conftest.c:9:20: fatal error: stdarg.h: No such file or directory
| These don't provoke an error unfortunately, instead are silently treated
| as 'x'. The following induces an error, until -std is added to get
conftest.c:9:20: fatal error: stdarg.h: No such file or directory
| These don't provoke an error unfortunately, instead are silently treated
| as 'x'. The following induces an error, until -std is added to get
cc: error: unrecognized command line option '-Xc'
| These don't provoke an error unfortunately, instead are silently treated
| as 'x'. The following induces an error, until -std is added to get
conftest.c:10:21: fatal error: limits.h: No such file or directory
| Syntax error
conftest.c:10:21: fatal error: limits.h: No such file or directory
| Syntax error
conftest.c:12:0: fatal error: assert.h: No such file or directory
| Syntax error
conftest.c:12:0: fatal error: assert.h: No such file or directory
| Syntax error
conftest.c:10:21: fatal error: limits.h: No such file or directory
| Syntax error
conftest.c:10:21: fatal error: limits.h: No such file or directory
| Syntax error
conftest.c:10:21: fatal error: limits.h: No such file or directory
| Syntax error
conftest.c:10:21: fatal error: limits.h: No such file or directory
| Syntax error
configure:4478: error: in `/usr/local/src/php-5.6.19':
configure:4480: error: C preprocessor "/lib/cpp" fails sanity check
gcc安装信息
[root@dev php-5.6.19]# rpm -qa | grep glibc
compat-glibc-headers-2.12-4.el7.centos.x86_64
glibc-utils-2.17-106.el7_2.4.x86_64
glibc-common-2.17-106.el7_2.4.x86_64
glibc-devel-2.17-106.el7_2.4.x86_64
glibc-static-2.17-106.el7_2.4.x86_64
glibc-2.17-106.el7_2.4.x86_64
glibc-headers-2.17-106.el7_2.4.x86_64
compat-glibc-2.12-4.el7.centos.x86_64
[root@dev php-5.6.19]# gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/4.8.5/lto-wrapper
Target: x86_64-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap --enable-shared --enable-threads=posix --enable-checking=release --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-linker-hash-style=gnu --enable-languages=c,c++,objc,obj-c++,java,fortran,ada,go,lto --enable-plugin --enable-initfini-array --disable-libgcj --with-isl=/builddir/build/BUILD/gcc-4.8.5-20150702/obj-x86_64-redhat-linux/isl-install --with-cloog=/builddir/build/BUILD/gcc-4.8.5-20150702/obj-x86_64-redhat-linux/cloog-install --enable-gnu-indirect-function --with-tune=generic --with-arch_32=x86-64 --build=x86_64-redhat-linux
Thread model: posix
gcc version 4.8.5 20150623 (Red Hat 4.8.5-4) (GCC)
回复内容:
第一次编译安装PHP的时候很顺利,因为要增加freetype,所以要重新编译,结果死活就是无法通过configure。
centos7信息
uname -a
Linux dev 3.10.0-327.el7.x86_64 #1 SMP Thu Nov 19 22:10:57 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
运行 ./configure 报错
configure: error: cannot run C compiled programs.
If you meant to cross compile, use `--host'.
运行 grep error config.log
cc: error: unrecognized command line option '-V'
cc: fatal error: no input files
cc: error: unrecognized command line option '-qversion'
cc: fatal error: no input files
conftest.c:9:19: fatal error: stdio.h: No such file or directory
configure:4076: error: in `/usr/local/src/php-5.6.19':
configure:4078: error: cannot run C compiled programs.
按照网上说的方法 在configure后面加上了 --host=x86_64 ,报错
configure: error: in `/usr/local/src/php-5.6.19':
configure: error: C preprocessor "/lib/cpp" fails sanity check
config.log中错误提示,差好几个头文件
cc: error: unrecognized command line option '-V'
cc: fatal error: no input files
cc: error: unrecognized command line option '-qversion'
cc: fatal error: no input files
conftest.c:9:19: fatal error: stdio.h: No such file or directory
configure:4076: error: in `/usr/local/src/php-5.6.19':
configure:4078: error: cannot run C compiled programs.
[root@dev php-5.6.19]# grep error config.log
cc: error: unrecognized command line option '-V'
cc: fatal error: no input files
cc: error: unrecognized command line option '-qversion'
cc: fatal error: no input files
conftest.c:9:19: fatal error: stdio.h: No such file or directory
conftest.c:9:20: fatal error: stdarg.h: No such file or directory
| These don't provoke an error unfortunately, instead are silently treated
| as 'x'. The following induces an error, until -std is added to get
cc: error: unrecognized command line option '-qlanglvl=extc89'
| These don't provoke an error unfortunately, instead are silently treated
| as 'x'. The following induces an error, until -std is added to get
cc: error: unrecognized command line option '-qlanglvl=ansi'
| These don't provoke an error unfortunately, instead are silently treated
| as 'x'. The following induces an error, until -std is added to get
cc: error: unrecognized command line option '-std'
| These don't provoke an error unfortunately, instead are silently treated
| as 'x'. The following induces an error, until -std is added to get
conftest.c:9:20: fatal error: stdarg.h: No such file or directory
| These don't provoke an error unfortunately, instead are silently treated
| as 'x'. The following induces an error, until -std is added to get
conftest.c:9:20: fatal error: stdarg.h: No such file or directory
| These don't provoke an error unfortunately, instead are silently treated
| as 'x'. The following induces an error, until -std is added to get
cc: error: unrecognized command line option '-Xc'
| These don't provoke an error unfortunately, instead are silently treated
| as 'x'. The following induces an error, until -std is added to get
conftest.c:10:21: fatal error: limits.h: No such file or directory
| Syntax error
conftest.c:10:21: fatal error: limits.h: No such file or directory
| Syntax error
conftest.c:12:0: fatal error: assert.h: No such file or directory
| Syntax error
conftest.c:12:0: fatal error: assert.h: No such file or directory
| Syntax error
conftest.c:10:21: fatal error: limits.h: No such file or directory
| Syntax error
conftest.c:10:21: fatal error: limits.h: No such file or directory
| Syntax error
conftest.c:10:21: fatal error: limits.h: No such file or directory
| Syntax error
conftest.c:10:21: fatal error: limits.h: No such file or directory
| Syntax error
configure:4478: error: in `/usr/local/src/php-5.6.19':
configure:4480: error: C preprocessor "/lib/cpp" fails sanity check
gcc安装信息
[root@dev php-5.6.19]# rpm -qa | grep glibc
compat-glibc-headers-2.12-4.el7.centos.x86_64
glibc-utils-2.17-106.el7_2.4.x86_64
glibc-common-2.17-106.el7_2.4.x86_64
glibc-devel-2.17-106.el7_2.4.x86_64
glibc-static-2.17-106.el7_2.4.x86_64
glibc-2.17-106.el7_2.4.x86_64
glibc-headers-2.17-106.el7_2.4.x86_64
compat-glibc-2.12-4.el7.centos.x86_64
[root@dev php-5.6.19]# gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/4.8.5/lto-wrapper
Target: x86_64-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap --enable-shared --enable-threads=posix --enable-checking=release --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-linker-hash-style=gnu --enable-languages=c,c++,objc,obj-c++,java,fortran,ada,go,lto --enable-plugin --enable-initfini-array --disable-libgcj --with-isl=/builddir/build/BUILD/gcc-4.8.5-20150702/obj-x86_64-redhat-linux/isl-install --with-cloog=/builddir/build/BUILD/gcc-4.8.5-20150702/obj-x86_64-redhat-linux/cloog-install --enable-gnu-indirect-function --with-tune=generic --with-arch_32=x86-64 --build=x86_64-redhat-linux
Thread model: posix
gcc version 4.8.5 20150623 (Red Hat 4.8.5-4) (GCC)
看起来像是gcc的问题,建议你先安装并更新一下yum源,然后安装或更新下如下软件
<code>yum update yum -y install ntp make openssl openssl-devel pcre pcre-devel libpng libpng-devel libjpeg-6b libjpeg-devel-6b freetype freetype-devel gd gd-devel zlib zlib-devel gcc gcc-c++ libXpm libXpm-devel ncurses ncurses-devel libmcrypt libmcrypt-devel libxml2 libxml2-devel imake autoconf automake screen sysstat compat-libstdc++-33 curl curl-devel </code>

PHP在现代Web开发中仍然重要,尤其在内容管理和电子商务平台。1)PHP拥有丰富的生态系统和强大框架支持,如Laravel和Symfony。2)性能优化可通过OPcache和Nginx实现。3)PHP8.0引入JIT编译器,提升性能。4)云原生应用通过Docker和Kubernetes部署,提高灵活性和可扩展性。

PHP适合web开发,特别是在快速开发和处理动态内容方面表现出色,但不擅长数据科学和企业级应用。与Python相比,PHP在web开发中更具优势,但在数据科学领域不如Python;与Java相比,PHP在企业级应用中表现较差,但在web开发中更灵活;与JavaScript相比,PHP在后端开发中更简洁,但在前端开发中不如JavaScript。

PHP和Python各有优势,适合不同场景。1.PHP适用于web开发,提供内置web服务器和丰富函数库。2.Python适合数据科学和机器学习,语法简洁且有强大标准库。选择时应根据项目需求决定。

PHP是一种广泛应用于服务器端的脚本语言,特别适合web开发。1.PHP可以嵌入HTML,处理HTTP请求和响应,支持多种数据库。2.PHP用于生成动态网页内容,处理表单数据,访问数据库等,具有强大的社区支持和开源资源。3.PHP是解释型语言,执行过程包括词法分析、语法分析、编译和执行。4.PHP可以与MySQL结合用于用户注册系统等高级应用。5.调试PHP时,可使用error_reporting()和var_dump()等函数。6.优化PHP代码可通过缓存机制、优化数据库查询和使用内置函数。7

PHP成为许多网站首选技术栈的原因包括其易用性、强大社区支持和广泛应用。1)易于学习和使用,适合初学者。2)拥有庞大的开发者社区,资源丰富。3)广泛应用于WordPress、Drupal等平台。4)与Web服务器紧密集成,简化开发部署。

PHP在现代编程中仍然是一个强大且广泛使用的工具,尤其在web开发领域。1)PHP易用且与数据库集成无缝,是许多开发者的首选。2)它支持动态内容生成和面向对象编程,适合快速创建和维护网站。3)PHP的性能可以通过缓存和优化数据库查询来提升,其广泛的社区和丰富生态系统使其在当今技术栈中仍具重要地位。

在PHP中,弱引用是通过WeakReference类实现的,不会阻止垃圾回收器回收对象。弱引用适用于缓存系统和事件监听器等场景,需注意其不能保证对象存活,且垃圾回收可能延迟。

\_\_invoke方法允许对象像函数一样被调用。1.定义\_\_invoke方法使对象可被调用。2.使用$obj(...)语法时,PHP会执行\_\_invoke方法。3.适用于日志记录和计算器等场景,提高代码灵活性和可读性。


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