php exec返回状态为1

最新推荐文章于 2025-06-13 13:31:07 发布

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本文介绍如何正确使用 PHP 的 exec 函数，并通过实例演示如何排查返回状态为 1 的错误。文章还提供了 exec 函数的参数说明及返回状态详解。

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之前在用到php exec 时总是保存，返回状态1，那这时怎么排查呢

exec('ls 2>&1', $output, $return_val); 
print_r($output);

使用 2>&1, 命令就会输出shell执行时的错误到$output变量, 输出该变量即可分析。
备注: exec有3个参数，第一个是要执行的命令，第二个是参数是一个数组，数组的值是由第一个命令执行后生成的，第三个参数执行的状态，0表示成功，其他都表示失败。

附：返回状态详解

Table D-1. "Reserved" Exit Codes
 Exit
 Code Number Meaning Example Comments
1 Catchall
 for general errors let "var1 = 1/0" Miscellaneous
 errors, such as "divide by zero"
2 Misuse
 of shell builtins (according to Bash documentation)   Seldom
 seen, usually defaults to exit code 1
126 Command
 invoked cannot execute   Permission
 problem or command is not an executable
127 "command
 not found"   Possible
 problem with $PATH or a typo
128 Invalid
 argument to exit exit
 3.14159 exit takes only integer args in the range 0
 - 255 (see footnote)
128+n Fatal
 error signal "n" kill -9 $PPID of
 script $? returns 137 (128
 + 9)
130 Script
 terminated by Control-C   Control-C
 is fatal error signal 2, (130 = 128 + 2, see above)
255* Exit
 status out of range exit -1 exit takes
 only integer args in the range 0 - 255

Exit Code Number	Meaning	Example	Comments
`1`	Catchall for general errors	let "var1 = 1/0"	Miscellaneous errors, such as "divide by zero"
`2`	Misuse of shell builtins (according to Bash documentation)		Seldom seen, usually defaults to exit code 1
`126`	Command invoked cannot execute		Permission problem or command is not an executable
`127`	"command not found"		Possible problem with `$PATH` or a typo
`128`	Invalid argument to exit	exit 3.14159	exit takes only integer args in the range 0 - 255 (see footnote)
`128+n`	Fatal error signal "n"	kill -9 `$PPID` of script	`$?` returns 137 (128 + 9)
`130`	Script terminated by Control-C		Control-C is fatal error signal 2, (130 = 128 + 2, see above)
`255*`	Exit status out of range	exit -1	exit takes only integer args in the range 0 - 255