If condition evaluates to a value that doesn't match any of the case: labels, and the default: label is not present, then none of the statements in the switch body is executed. If condition evaluates to a value that doesn't match any of the case: labels, and the default: label is present, control is transferred to the statement labeled with the default: label. If condition evaluates to a value that is equal to the value of one of constant-expressions, then control is transferred to the statement that is labeled with that constant-expression. At most one default: label may be present (although nested switch statements may use their own default: labels or have case: labels whose constants are identical to the ones used in the enclosing switch). PHP also supports the alternative syntax for the switch statement as follows: expression, in this case the value of condition is the value of the expression.Note that any init-statement must end with a semicolon, which is why it is often described informally as an expression or a declaration followed by a semicolon. a simple declaration, typically a declaration of a variable with initializer, but it may declare arbitrarily many variables or structured bindings.an expression statement (which may be a null statement " ").$message = 'Welcome! Check out some new articles.Attrâ (optional) switch ( init-statementâ (optional) condition ) statement PHP continues to execute the statements until the end of the switch block, or the first time it sees a break statement. When the value of a single variable specifies the number of different choices, itâs much cleaner to use the switch statement like this:
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