意想不到的“。”

如果您试图在不受支持的PHP版本中使用splat操作符(…)，就会发生这种情况。

．.． 首次在PHP 5.6中可用来捕获函数的可变数量的参数:

function concatenate($transform, ...$strings) {
    $string = '';
    foreach($strings as $piece) {
        $string .= $piece;
    }
    return($transform($string));
}

echo concatenate("strtoupper", "I'd ", "like ", 4 + 2, " apples");
// This would print:
// I'D LIKE 6 APPLES

在PHP 7.4中，可以将它用于Array表达式。

$parts = ['apple', 'pear'];
$fruits = ['banana', 'orange', ...$parts, 'watermelon'];
// ['banana', 'orange', 'apple', 'pear', 'watermelon'];

意想不到的T_IF 意想不到的T_FOREACH 意想不到的T_FOR 意想不到的T_WHILE 意想不到的T_DO 意想不到的T_ECHO

控制结构，如if、foreach、for、while、list、global、return、do、print、echo只能作为语句使用。它们通常单独驻留在一行上。

Semicolon; where you at? Pretty universally have you missed a semicolon in the previous line if the parser complains about a control statement: ⇓ $x = myfunc() if (true) { Solution: look into the previous line; add semicolon. Class declarations Another location where this occurs is in class declarations. In the class section you can only list property initializations and method sections. No code may reside there. class xyz { if (true) {} foreach ($var) {} Such syntax errors commonly materialize for incorrectly nested { and }. In particular when function code blocks got closed too early. Statements in expression context Most language constructs can only be used as statements. They aren't meant to be placed inside other expressions: ⇓ $var = array(1, 2, foreach($else as $_), 5, 6); Likewise can't you use an if in strings, math expressions or elsewhere: ⇓ print "Oh, " . if (true) { "you!" } . " won't work"; // Use a ternary condition here instead, when versed enough. For embedding if-like conditions in an expression specifically, you often want to use a ?: ternary evaluation. The same applies to for, while, global, echo and a lesser extend list. ⇓ echo 123, echo 567, "huh?"; Whereas print() is a language built-in that may be used in expression context. (But rarely makes sense.) Reserved keywords as identifiers You also can't use do or if and other language constructs for user-defined functions or class names. (Perhaps in PHP 7. But even then it wouldn't be advisable.) Your have a semi-colon instead of a colon (:) or curly bracket ({) after your control block Control structures are typically wrapped in curly braces (but colons can be used in an alternative syntax) to represent their scope. If you accidentally use a semi-colon you prematurely close that block resulting in your closing statement throwing an error.

    foreach ($errors as $error); <-- should be : or {

意想不到的(

开括号通常跟在if/foreach/for/array/list这样的语言结构之后，或者开始一个算术表达式。它们在“strings”后，previous()，单独的$和一些典型的声明上下文中都是语法错误的。

Function declaration parameters A rarer occurrence for this error is trying to use expressions as default function parameters. This is not supported, even in PHP7: function header_fallback($value, $expires = time() + 90000) { Parameters in a function declaration can only be literal values or constant expressions. Unlike for function invocations, where you can freely use whatever(1+something()*2), etc. Class property defaults Same thing for class member declarations, where only literal/constant values are allowed, not expressions: class xyz { ⇓ var $default = get_config("xyz_default"); Put such things in the constructor. See also Why don't PHP attributes allow functions? Again note that PHP 7 only allows var $xy = 1 + 2 +3; constant expressions there. JavaScript syntax in PHP Using JavaScript or jQuery syntax won't work in PHP for obvious reasons: <?php ⇓ print $(document).text(); When this happens, it usually indicates an unterminated preceding string; and literal <script> sections leaking into PHP code context. isset(()), empty, key, next, current Both isset() and empty() are language built-ins, not functions. They need to access a variable directly. If you inadvertently add a pair of parentheses too much, then you'd create an expression however: ⇓ if (isset(($_GET["id"]))) { The same applies to any language construct that requires implicit variable name access. These built-ins are part of the language grammar, therefore don't permit decorative extra parentheses. User-level functions that require a variable reference -but get an expression result passed- lead to runtime errors instead.

意想不到的)

Absent function parameter You cannot have stray commas last in a function call. PHP expects a value there and thusly complains about an early closing ) parenthesis. ⇓ callfunc(1, 2, ); A trailing comma is only allowed in array() or list() constructs. Unfinished expressions If you forget something in an arithmetic expression, then the parser gives up. Because how should it possibly interpret that: ⇓ $var = 2 * (1 + ); And if you forgot the closing ) even, then you'd get a complaint about the unexpected semicolon instead. Foreach as constant For forgotten variable $ prefixes in control statements you will see: ↓ ⇓ foreach ($array as wrong) { PHP here sometimes tells you it expected a :: instead. Because a class::$variable could have satisfied the expected $variable expression..

意想不到的{

花括号{和}括起代码块。关于它们的语法错误通常表示一些不正确的嵌套。

Unmatched subexpressions in an if Most commonly unbalanced ( and ) are the cause if the parser complains about the opening curly { appearing too early. A simple example: ⇓ if (($x == $y) && (2 == true) { Count your parentheses or use an IDE which helps with that. Also don't write code without any spaces. Readability counts. { and } in expression context You can't use curly braces in expressions. If you confuse parentheses and curlys, it won't comply to the language grammar: ⇓ $var = 5 * {7 + $x}; There are a few exceptions for identifier construction, such as local scope variable ${references}. Variable variables or curly var expressions This is pretty rare. But you might also get { and } parser complaints for complex variable expressions: ⇓ print "Hello {$world[2{]} !"; Though there's a higher likelihood for an unexpected } in such contexts.

意想不到的}

当出现“意外}”错误时，您多半过早地关闭了代码块。

Last statement in a code block It can happen for any unterminated expression. And if the last line in a function/code block lacks a trailing ; semicolon: function whatever() { doStuff() } ⇧ Here the parser can't tell if you perhaps still wanted to add + 25; to the function result or something else. Invalid block nesting / Forgotten { You'll sometimes see this parser error when a code block was } closed too early, or you forgot an opening { even: function doStuff() { if (true) ⇦ print "yes"; } } ⇧ In above snippet the if didn't have an opening { curly brace. Thus the closing } one below became redundant. And therefore the next closing }, which was intended for the function, was not associable to the original opening { curly brace. Such errors are even harder to find without proper code indentation. Use an IDE and bracket matching.

意料之外的，期待的

需要条件/声明标头和代码块的语言构造将触发此错误。

参数列表 例如，不允许错误声明没有参数列表的函数: ⇓ 函数whatever { ｝ 控制语句条件 你也不能无条件地有一个如果。 ⇓ 如果{ ｝ 这显然说不通。对于常见的疑点，for/foreach, while/do等等，也是如此。 如果您遇到了这种特殊的错误，您绝对应该查找一些手册示例。

意外的'endwhile' (T_ENDWHILE)

语法使用冒号-如果没有冒号，就会发生上述错误。

<?php while($query->fetch()): ?>
 ....
<?php endwhile; ?>

这种语法的替代方法是使用花括号:

<?php while($query->fetch()) { ?>
  ....
<?php } ?>

http://php.net/manual/en/control-structures.while.php

意想不到的:

1. PHP 8命名参数语法

Unexpected ':'， expected '，' or ')'

如果试图在PHP < 8的版本中使用PHP 8的新命名形参功能，将会出现以下错误:

$table->string(column:'Name');

解决方案:

将PHP版本升级到PHP 8.0.0或更高版本 不要使用命名参数(按照预期的顺序传递参数)

2. 裁剪类::分隔符

以“解析错误:语法错误，意外的‘:’”开头的错误消息可能是由于错误地将类静态引用class::$Variable写成class:$Variable而引起的。

意想不到的“。”

如果您试图在不受支持的PHP版本中使用splat操作符(…)，就会发生这种情况。

．.． 首次在PHP 5.6中可用来捕获函数的可变数量的参数:

function concatenate($transform, ...$strings) {
    $string = '';
    foreach($strings as $piece) {
        $string .= $piece;
    }
    return($transform($string));
}

echo concatenate("strtoupper", "I'd ", "like ", 4 + 2, " apples");
// This would print:
// I'D LIKE 6 APPLES

在PHP 7.4中，可以将它用于Array表达式。

$parts = ['apple', 'pear'];
$fruits = ['banana', 'orange', ...$parts, 'watermelon'];
// ['banana', 'orange', 'apple', 'pear', 'watermelon'];